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1.  catena-Poly[[tetra­aqua­nickel(II)]-μ-(9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carboxyl­ato)-κ2 O 1:O 8-[tetra­aqua­nickel(II)]-μ-4,4′-bipyridine-κ2 N:N′] 
In the crystal of the title polymeric complex, [Ni2(C18H4O10)(C10H8N2)(H2O)8]n, each NiII cation is coord­in­ated by four water mol­ecules in the equatorial plane, and is further bridged by an 9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carb­oxy­l­ate anion and a 4,4′-bipyridine ligand in the axial directions, forming a distorted octa­hedral geometry. The 9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carboxyl­ate anion is centrosymmetric with the centroid of the quinone ring located about an inversion center; the 4,4′-bipyridine ligand is also centrosymmetric with the mid-point of the C—C bond linking two pyridine rings located about another invertion center. The 9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carboxyl­ate anion and bypiridine ligand bridge the NiII cations, forming a polymeric chain along the b axis. π–π stacking is observed between pyridine and benzene rings [centroid–centroid distance = 3.705 (2) Å]. All of the coordinating water mol­ecules are involved in O—H⋯O hydrogen bonding.
doi:10.1107/S1600536812027493
PMCID: PMC3393213  PMID: 22807781
2.  (Benzyl­diphenyl­phosphine-3κP)[μ-bis(diphenyl­arsino)methane-1:2κ2 As:As′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-triangulo-triruthenium(0) 
The asymmetric unit of the title triangulo-triruthenium compound, [Ru3(C25H22As2)(C19H17P)(CO)9], consists of two crystallographically independent mol­ecules of the triangulo-triruthenium complex, A and B. The bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the phosphine and arsine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. With regard to the three phosphine-substituted rings, the benzyl ring makes dihedral angles of 41.0 (3) and 43.9 (3)° with the other two benzene rings in mol­ecule A; these angles are 49.8 (3) and 56.8 (3)° in mol­ecule B. The dihedral angles between the two benzene rings are 76.1 (3) and 88.2 (3)° for the two diphenyl­arsino groups in mol­ecule A and 71.3 (3) and 78.1 (3)° in mol­ecule B. In the crystal packing, mol­ecules are linked into chains via inter­molecular C—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.
doi:10.1107/S1600536809053045
PMCID: PMC2980180  PMID: 21579968
3.  [μ-Bis(di-o-tolyl­phosphan­yl)methane-1:2κ2 P:P′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-(triphenyl phosphite-3κP)-triangulo-triruthenium(0) chloro­form disolvate 
In the title solvated triangulo-triruthenium compound, [Ru3(C18H15O3P)(C29H30P2)(CO)9]·2CHCl3, the bis­(di-o-tolyl­phosphan­yl)methane (dtpm) ligand bridges one of the Ru—Ru bonds and the monodentate phosphine ligand bonds to the third Ru atom. All the P atoms are equatorial with respect to the Ru3 triangle: each Ru atom also bears one equatorial and two axial terminal carbonyl ligands. The dihedral angles between the two benzene rings are 75.92 (10) and 78.95 (10)° for the two diphenyl­phosphanyl groups of the dtpm ligand. In the crystal, C—H⋯O hydrogen bonds link the mol­ecules into chains along [010].
doi:10.1107/S1600536812023227
PMCID: PMC3379136  PMID: 22719357
4.  [2-({Benz­yl[2-(benz­yl{5-methyl-2-oxido-3-[(pyridin-2-ylmeth­yl)imino­meth­yl]benz­yl}amino)­eth­yl]aza­nium­yl}meth­yl)-4-methyl-6-[(pyridin-2-ylmeth­yl)imino­meth­yl]phenolato]nickel(II) perchlorate methanol disolvate 
In the solvated title complex, [Ni(C46H47N6O2)]ClO4·2CH4O, the coordination sphere around the NiII ion can be described as distorted cis-NiO2N4 octa­hedral defined by two phenolate O atoms and four N atoms from the hexa­dentate ligand. An intra­molecular bifurcated N—H⋯(N,O) hydrogen bond helps to establish the conformation of the complex mol­ecule. In the crystal, the components are connected by O—H⋯O and C—H⋯O hydrogen bonds.
doi:10.1107/S1600536812024191
PMCID: PMC3379195  PMID: 22719393
5.  2-(4-Ferrocenylphen­yl)-4,4,5,5-tetra­methyl-1,3,2-dioxaborolane 
In the title compound,, [Fe(C5H5)(C17H20BO2)], the two near parallel cyclo­penta­dienyl rings of the ferrocene group are eclipsed. The benzene ring is tilted with respect to the attached cyclo­penta­diene ring by 17.0 (1)° and by 24.2 (1)° with respect to the dioxaborolane ring. The mol­ecules assemble in the crystal via C—H⋯π inter­actions between the cyclo­penta­dienyl H atoms and the benzene and cyclo­penta­dienyl rings of neighbouring mol­ecules.
doi:10.1107/S1600536808035228
PMCID: PMC2959994  PMID: 21581115
6.  Penta­carbonyl-2κ5 C-chlorido-1κCl-bis­[1(η5)-cyclo­penta­dien­yl](μ-α-oxido­benzyl­idene-1:2κ2 O:C)titanium(IV)tungsten(0) 
The title compound, [TiW(C5H5)2(C7H5O)Cl(CO)5], consists of two metal centres, with a (tungstenpenta­carbon­yl)oxy­phenyl­carbene unit coordinated by a titanocene chloride. The oxycarbene group is nearly planar, with the phenyl ring twisted by an angle of 39.1 (2)° with respect to this plane. One of the cyclo­penta­dienyl rings undergoes an offset face-to-face π–π inter­action [3.544 (6) Å] with the symmetry-related cyclo­penta­dienyl ring of a neighbouring mol­ecule.
doi:10.1107/S1600536808036465
PMCID: PMC2960115  PMID: 21581149
7.  Undeca­carbonyl-1κ3 C,2κ4 C,3κ4 C-[tris­(3-chloro­phen­yl)phosphine-1κP]-triangulo-triruthenium(0) 
In the title triangulo-triruthenium compound, [Ru3(C18H12Cl3P)(CO)11], one equatorial carbonyl group has been substituted by the monodentate phosphine ligand, leaving one equatorial and two axial carbonyl substituents on the Ru atom. The remaining two Ru atoms each carry two equatorial and two axial terminal carbonyl ligands. The three benzene rings make dihedral angles of 87.83 (17), 69.91 (17) and 68.26 (17)° with each other. In the crystal structure, mol­ecules are linked into dimers by inter­molecular C—H⋯O hydrogen bonds. The mol­ecular structure is stabilized by an intra­molecular C—H⋯O hydrogen bond.
doi:10.1107/S1600536810013826
PMCID: PMC2979078  PMID: 21579060
8.  9-[3-(Dimethyl­amino)­prop­yl]-10,10-dimethyl-9,10-dihydro­anthracen-9-ol 
The asymmetric unit of the title compound, C21H27NO, contains two mol­ecules (A and B). In mol­ecule A, the central ring of the anthrone unit adopts a shallow boat conformation and the dihedral angle between the benzene rings is 18.96 (7)°. In mol­ecule B, the central ring is close to being planar (r.m.s. deviation = 0.078 Å) and the dihedral angle between the aromatic rings is 7.82 (7)°. In the crystal, mol­ecules are linked by O—H⋯N hydrogen bonds, forming zigzag C(7) chains of alternating A and B mol­ecules running parallel to [100]. The structure also features weak C—H⋯O and C—H⋯π inter­actions.
doi:10.1107/S1600536812050088
PMCID: PMC3569237  PMID: 23424460
9.  4-(9,10-Dioxo-9,10-dihydro­anthracen-1-yl)-4-oxobutanoic acid 
In the title compound, C18H12O5, the anthracene moiety is almost planar (r.m.s. deviation = 0.0399 Å). In the crystal, mol­ecules are linked to each other by inter­molecular O—H⋯O and weak C—H⋯O hydrogen bonds.
doi:10.1107/S160053681004732X
PMCID: PMC3011440  PMID: 21589526
10.  Poly[tetra­aqua­(μ6-9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carboxyl­ato)dimanganese(II)] 
The title complex, [Mn2(C18H4O10)(H2O)4]n, was synthesized from manganese(II) chloride tetra­hydrate and 9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carb­oxy­lic acid (H4AQTC) in water. The anthraquinone unit is located about a crystallographic center of inversion. Each asymmetric unit therefore contains one MnII atom, two water ligands and one half AQTC4− anion. The MnII atom is coordinated in a distorted octa­hedral geometry by four O atoms from three AQTC4− ligands and two water O atoms. Two of the carboxyl­ate groups coordinate one MnII atom in a chelating mode, whereas the others each coordinate two MnII atoms. Each AQTC4− tetra-anion therefore coordinates six different MnII ions and, as a result, a three-dimensional coordination polymer is formed. O—H⋯O hydrogen bonds, some of them bifurcated, between water ligands and neighboring water or anthraquinone ligands are observed in the crystal structure.
doi:10.1107/S1600536812027158
PMCID: PMC3393211  PMID: 22807779
11.  Poly[[bis­{μ2-1,2-bis­[(1H-imidazol-1-yl)meth­yl]benzene}(μ4-9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carbox­yl­ato)dicobalt(II)] dihydrate] 
The title complex, {[Co2(C18H4O10)(C14H14N4)2]·2H2O}n was synthesized from CoCl2·6H2O, 9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carb­oxy­lic acid (H4AQTC) and 1,2-bis­[(1H-imidazol-1-yl)meth­yl]benzene (o-bix) in water. The anthraquinone unit is located about a crystallographic center of inversion. Each asymmetric unit therefore contains one CoII atom and one o-bix ligand, as well as half an AQTC4− ligand and an additional solvent water mol­ecule. The CoII ions are tetra­hedrally surrounded by two O atoms from two AQTC4− anions and by two N atoms from two o-bix ligands, forming a two-dimensional coordination polymer. The solvent water mol­ecules are connected to the carboxyl­ate groups by O—H⋯O hydrogen bonds. Additional weak C—H⋯O hydrogen bonds are observed in the crystal structure.
doi:10.1107/S160053681202716X
PMCID: PMC3588523  PMID: 23476486
12.  9,10-Dihydr­oxy-4,4-dimethyl-5,8-dihydro­anthracen-1(4H)-one 
In the title mol­ecule, C16H16O3, the ring system is planar and an intramolecular hydrogen bond is present. The mol­ecular packing is dominated by an inter­molecular hydrogen bond and by π-stacking inter­actions [inter­planar separation 3.8012 Å].
doi:10.1107/S1600536808010891
PMCID: PMC2961891  PMID: 21202942
13.  9,10-Dioxo-9,10-di­hydro­anthracene-1,4-diyl di­acetate 
In the title compound, C18H12O6, the anthra­quinone ring system is nearly planar [maximum deviation = 0.161 (3) Å] and both acetate groups are located on the same side of the ring plane. A supra­molecular architecture arises in the crystal owing to π–π stacking between parallel benzene rings of adjacent mol­ecules [centroid–centroid distance = 3.883 (4) Å] and weak inter­molecular C—H⋯O hydrogen bonding.
doi:10.1107/S1600536813010635
PMCID: PMC3648311  PMID: 23723931
14.  [μ-Bis(diphenyl­arsino)methane-1:2κ2 As:As’]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-(triphenyl phosphite-3κP)-triangulo-triruthenium(0) 
The asymmetric unit of the title triangulo-triruthenium compound, [Ru3(C25H22As2)(C18H15O3P)(CO)9], contains two crystallographically independent but similar mol­ecules. The bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphite ligand bonds to the third Ru atom. Both the phosphite and arsine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. One of the triphenyl­phosphite benzene rings in one of the mol­ecules is disordered over two positions with refined site occupancies of 0.60 (3) and 0.40 (3). In the crystal packing, the mol­ecules are stacked along a axis. Intra­molecular C—H⋯O hydrogen bonds stabilize the mol­ecular structure and weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure. The crystal studied was a non-merohedral twin, the refined ratio of the twin components being 0.618 (1):0.382 (1).
doi:10.1107/S1600536810001200
PMCID: PMC2979706  PMID: 21579683
15.  Benzyl 5-ferrocenyl-3-(4-methyl­phen­yl)-2-pyrazoline-1-dithio­carboxyl­ate 
In the title compound, [Fe(C5H5)(C23H21N2S2)], the cyclo­penta­dienyl rings of the ferrocenyl unit deviate slightly from the eclipsed form. In the pyrazoline ring, the N atom bonded to S-benzyl dithio­carbazate exhibits unconventional sp 2-hybrid character in order to form an extended conjugated system. The pyrazoline ring displays an envelope conformation. The mol­ecules are linked into chains along the b axis via C—H⋯S inter­molecular hydrogen bonds.
doi:10.1107/S1600536807066536
PMCID: PMC2915138  PMID: 21200556
16.  [μ-Bis(diphenyl­arsino)methane-1:2κ2 As:As′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-[diphen­yl(phenyl­sulfanylmeth­yl)phosphine-3κP]-triangulo-triruthenium(0) chloro­form hemisolvate 
The asymmetric unit of the title triangulo-triruthenium cluster, [Ru3(C25H22As2)(C19H17PS)(CO)9]·0.5CHCl3, contains of one mol­ecule of the triangulo-triruthenium complex and half a mol­ecule of the disordered (two positions of equal weight) chloro­form solvent. The bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the arsine and phosphine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The benzene ring of phenyl­thio­methyl is disordered over two positions with refined site occupancies of 0.788 (11) and 0.212 (11). In the crystal packing, mol­ecules are linked into chains along b axis by inter­molecular C—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.
doi:10.1107/S1600536810001212
PMCID: PMC2979739  PMID: 21579685
17.  [μ-Bis(diphenyl­arsino)methane-1:2κ2 As:As′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-[(penta­fluoro­phen­yl)diphenyl­phosphine-3κP]-triangulo-triruthenium(0) chloro­form monosolvate 
The asymmetric unit of the title triangulo-triruthenium compound, [Ru3(C25H22As2)(C18H10F5P)(CO)9]·CHCl3, contains one mol­ecule of the triangulo-triruthenium complex and one mol­ecule of the disordered chloro­form solvent. The bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the arsine and phosphine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The phosphine-substituted benzene rings make dihedral angles of 68.43 (15), 65.14 (14) and 89.75 (14)° with each other. The dihedral angles between the two benzene rings are 80.70 (15) and 84.53 (16)° for the two diphenyl­arsino groups. In the crystal packing, the mol­ecules are linked into a plane parallel to bc by inter­molecular C—H⋯O and C—H⋯F hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.
doi:10.1107/S1600536809055275
PMCID: PMC2979800  PMID: 21579648
18.  [μ-Bis(diphenyl­arsino)methane-1:2κ2 As:As′][(4-bromo­phen­yl)diphenyl­phosphine-3κP]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-triangulo-tri­ruthenium(0) chloro­form 0.3-solvate 
The asymmetric unit of the title triangulo-triruthenium compound, [Ru3(C25H22As2)(C18H14BrP)(CO)9]·0.3CHCl3, contains one mol­ecule of the triangulo-triruthenium complex and one partially occupied disordered chloro­form solvent mol­ecule. The bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the arsine and phosphine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The phosphine-substituted benzene rings make dihedral angles of 67.5 (3), 76.1 (3) and 78.1 (3)° with each other. The dihedral angles between the two benzene rings are 79.0 (4) and 81.4 (3)° for the two diphenyl­arsino groups. In the crystal packing, the mol­ecules are linked into chains along the a axis by inter­molecular C—H⋯O hydrogen bonds.
doi:10.1107/S1600536809055287
PMCID: PMC2979922  PMID: 21579649
19.  Bis{[μ-bis­(diphenyl­arsino)methane-1:2κ2 As:As′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-[tris­(4-chloro­phen­yl)phosphine-3κP]-triangulo-triruthenium(0)} chloro­form monosolvate 
The asymmetric unit of the title triangulo-triruthenium compound, 2[Ru3(C25H22As2)(C18H12Cl3P)(CO)9]·CHCl3, consists of two mol­ecules (A and B) of the triangulo-triruthenium complex and one mol­ecule of chloro­form solvent. The bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the phosphine and arsine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three phosphine-substituted benzene rings make dihedral angles of 73.5 (3), 57.2 (3) and 75.7 (3)° with each other in mol­ecule A, while these angles are 60.7 (3), 86.8 (3) and 54.9 (3)° in mol­ecule B. The dihedral angles between the two benzene rings are 87.3 (3) and 89.6 (3)° for the two diphenyl­arsino groups in mol­ecule A and 85.6 (3) and 87.7 (3)° in mol­ecule B. In the crystal packing, the mol­ecules are linked into a three-dimensional framework via inter­molecular C—H⋯O and C—H⋯Cl hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions furture stabilize the crystal structure. The crystal studied was an inversion twin, the refined ratio of twin components being 0.480 (7):0.520 (7).
doi:10.1107/S1600536809053884
PMCID: PMC2980153  PMID: 21579981
20.  [μ-Bis(diphenyl­phosphan­yl)ethane-1:2κ2 P:P′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-[tris­(4-(meth­oxy­phen­yl)arsane-3κAs]-triangulo-triruthenium(0) chloro­form monosolvate 
The asymmetric unit of the title triangulo-triruthenium compound, [Ru3(C21H21AsO3)(C26H24P2)(CO)9]·CHCl3, consists of one mol­ecule of the triangulo-triruthenium complex and one chloro­form solvent mol­ecule. The bis(diphenyl­phosphan­yl)ethane ligand bridges an Ru—Ru bond and the monodentate arsane ligand bonds to the third Ru atom. Both the arsane and phosphine ligands are equatorial with respect to the Ru3 triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three arsane-substituted benzene rings make dihedral angles of 52.72 (19), 63.03 (19) and 88.19 (19)° with each other. The dihedral angles between the two benzene rings are 85.8 (2) and 89.2 (2)° for the two diphenyl­phosphanyl groups. In the crystal, mol­ecules are linked together into a three-dimensional network via inter­molecular C—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.
doi:10.1107/S160053681100047X
PMCID: PMC3051462  PMID: 21522851
21.  [μ-Bis(diphenyl­phosphan­yl)ethane-1:2κ2 P:P′]nona­carbonyl-1κ3 C,2κ3 C,3κ3 C-(triphenyl­stibine-3κSb)-triangulo-triruthenium(0) 
The asymmetric unit of the title triangulo-triruthenium compound, [Ru3(C26H24P2)(C18H15Sb)(CO)9], consists of two crystallographically independent mol­ecules, A and B. The bis­(diphenyl­phosphan­yl)ethane ligand bridges an Ru—Ru bond and the monodentate stibine ligand bonds to the third Ru atom. Both the stibine and phosphine ligands are equatorial with respect to the Ru3 triangle. Additionally, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. The three stibine-substituted benzene rings make dihedral angles of 38.7 (3), 71.5 (3) and 70.0 (3)° with each other in mol­ecule A whereas these angles are 83.9 (3), 88.2 (3) and 56.8 (3)° in mol­ecule B. Similarly, the dihedral angles between the two benzene rings are 80.7 (3) and 87.6 (3)° for the two diphenyl­phosphanyl groups in mol­ecule A and 84.0 (3) and 72.6 (4)° in mol­ecule B. In the crystal, mol­ecules are linked into tetra­mers via inter­molecular C—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.
doi:10.1107/S1600536810054218
PMCID: PMC3051588  PMID: 21522852
22.  μ-1,1′-Bis(diphenyl­phosphino)ferrocene-κ2 P:P′-bis­{[(Z)-O-isopropyl N-(4-nitro­phen­yl)thio­carbamato-κS]gold(I)} chloro­form disolvate 
The dinuclear title mol­ecule, [Au2Fe(C10H11N2O3S)2(C17H14P)2]·2CHCl3, has crystallographic twofold symmetry with the Fe atom (bonded to two η5-cyclo­penta­dienyl rings) situated on the rotation axis. The Au atom exists within a linear geometry defined by an S,P-donor set with a deviation from linearity [S—Au—P = 176.86 (6)°] due to the close approach of the thio­carbamate O atom [Au⋯O = 3.108 (5) Å]. The mol­ecule has a U-shaped geometry which facilitates the formation of an intra­molecular Au⋯Au inter­action [3.0231 (5) Å]. In the crystal, the presence of C—H⋯Onitro contacts leads to the formation of layers with substantial voids; these are occupied by the solvent mol­ecules of crystallization, which are held in place by C—H⋯S contacts.
doi:10.1107/S1600536809043864
PMCID: PMC2971012  PMID: 21578191
23.  [μ-Bis(di-o-tolyl­phosphan­yl)methane-1:2κ2 P:P′]deca­carbonyl-1κ3 C,2κ3 C,3κ4 C-triangulo-triruthenium(0)–methanol (8/1) 
The asymmetric unit of the title compound, [Ru3(C29H30P2)(CO)10].1/8CH3OH, contains two triangulo-triruthenium mol­ecules with similar configurations and a methanol solvent mol­ecule (fractional site occupancy for the latter = 0.25). The bis­(di-o-tolyl­phosphan­yl)methane ligand bridges an Ru—Ru bond and its P atoms are equatorial with respect to the Ru3 triangle. The phosphine-substituted Ru atoms each bear one equatorial and two axial terminal carbonyl ligands whereas the unsubstituted Ru atom carries two equatorial and two axial terminal carbonyl ligands. The dihedral angles between the two benzene rings attached to each P atom are 76.26 (13) and 74.76 (15)° for the first mol­ecule and 77.21 (13) and 75.68 (14)° for the second. In the crystal, mol­ecules are linked into [001] chains via inter­molecular C—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯π inter­actions also occur.
doi:10.1107/S1600536811000791
PMCID: PMC3051575  PMID: 21522864
24.  Nonacarbonyl-1κ3 C,2κ3 C,3κ3 C-μ-bis­(diphenyl­arsino)methane-1:2κ2 As:As’-[tris­(2-chloro­eth­yl) phosphite-3κP]-triangulo-triruthenium(0) 
In the title triangulo-triruthenium(0) compound, [Ru3(C25H22As2)(C6H12Cl3O3P)(CO)9], the bis­(diphenyl­arsino)methane ligand bridges an Ru—Ru bond and the monodentate phosphine ligand bonds to the third Ru atom. Both the arsine and phosphine ligands are equatorial with respect to the Ru3 triangle. In addition, each Ru atom carries one equatorial and two axial terminal carbonyl ligands. In the crystal packing, the mol­ecules are linked by inter­molecular C—H⋯O hydrogen bonds into a three-dimensional framework. Weak inter­molecular C—H⋯π inter­actions further stabilize the crystal structure.
doi:10.1107/S1600536810026267
PMCID: PMC3007339  PMID: 21588162
25.  9-[(2-Hy­droxy­benzyl­idene)amino]-11-(2-hy­droxy­phen­yl)-10,13-diphenyl-8-oxa-12-azoniatricyclo­[7.3.1.02,7]trideca-2(7),3,5-triene acetate ethanol disolvate 
The title compound, C36H31N2O3 +,C2H3O2 −·2C2H5OH, the product of a domino condensation of dibenzyl ketone with salicylic aldehyde and ammonium acetate, crystallized as the ethanol disolvate. The cation of the salt comprises a fused tricyclic system containing three six-membered rings (piperidine, dihydro-2H-pyran and benzene). The piperidine ring has the usual chair conformation, while the dihydro­pyran ring adopts a slightly distorted sofa conformation. In the crystal, there are six (one intra- and five inter­molecular) independent hydrogen-bonding inter­actions: the inter­molecular hydrogen bonds link the cations and anions and ethanol solvent mol­ecules into ribbons along [001]. The ribbons are stacked along the a axis.
doi:10.1107/S160053681100376X
PMCID: PMC3052148  PMID: 21522325

Results 1-25 (118230)