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1.  2,2,7,7,12,12,17,17-Octa­methyl-21,22,23,24-tetra­thia-2,7,12,17-tetra­germapenta­cyclo­[16.2.1.13,6.18,11.113,16]tetra­cosa-3,5,8,10,13,15,18,20-octa­ene 
The title compound, [Ge4(CH3)8(C4H2S)4], crystallizes with one-half mol­ecule in the asymmetric unit, the whole mol­ecule being generated by inversion symmetry. The dihedral angle between adjacent thio­phene rings is 72.84 (14)°. In the crystal, mol­ecules are linked by C—H⋯π inter­actions, leading to the formation of chains along [100].
doi:10.1107/S1600536812049720
PMCID: PMC3588302  PMID: 23476334
2.  Di-tert-butyl N-{[1-(pyridin-4-yl)-1H-1,2,3-triazol-4-yl]methyl}iminodiacetate 
In the title compound, C20H29N5O4, the pyridine ring makes a dihedral angle of 10.41 (16)° with the triazole ring, which exhibits an azo-like character. In the crystal, mol­ecules are linked by C—H⋯O and C—H⋯N hydrogen bonds, and C—H⋯π inter­actions involving a methyl group and the pyridine ring of a neighbouring mol­ecule, leading to the formation of a three-dimensional network.
doi:10.1107/S1600536812042596
PMCID: PMC3515257  PMID: 23284477
3.  Tris(η5-cyclo­penta­dien­yl)-tris­[η6-[9,10-dihydro­anthracene-9,10-endo-3′,4′-(N-benz­yl)pyrrolidine]]triruthenium(II) tris­(hexa­fluoro­phosphate) acetone disolvate 
In the title compound, [Ru3(C25H23N)(C5H5)3]·3PF6·2C3H6O], the cation is a triruthenium complex of a 9,10-dihydro­anthracene derivative. Three RuCp+ (Cp is cyclo­penta­dien­yl) groups are bonded to the three aromatic rings of the ligand. Surprisingly, the pyramidalized N atom of the heterocycle (Σ C—N—C = 329.0°) points towards the anthracenyl group, so losing its coordinative ability. There is an inter­molecular C—H⋯π inter­action involving an acetone mol­ecule and the adjacent benzyl ring of the ligand. In the crystal, mol­ecules are linked via a number of C—H⋯O and C—H⋯F inter­actions and a C—H⋯π inter­action, leading to the formation of a three-dimensional supra­molecular structure. One of the Cp groups is disordered over two positions, with refined occupancies of 0.695 (14):0.305 (14). Two of the three hexa­fluoro­phospate anions are disordered, with refined occupancies of 0.630 (6):0.370 (6) and 0.771 (8):0.229 (8). One of the two solvent acetone mol­ecules is also disordered, with refined occupancies of 0.82 (2):0.18 (2).
doi:10.1107/S1600536812040652
PMCID: PMC3470180  PMID: 23125624

Results 1-3 (3)