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1.  Bis(acetato-κ2 O,O′)(4,4′-dimethyl-2,2′-bipyridine-κ2 N,N′)­zinc 
The mol­ecular structure of the title compound, [Zn(CH3COO)2(C12H12N2)], consists of isolated mol­ecules bis­ected by a twofold rotation axis which goes through the ZnII cation and halves the organic base through the central C—C bond. The ZnII ion is coordinated by two N atoms from one mol­ecule of the aromatic base and four O atoms from two bidentate, symmetry-related acetate anions, which coordinate asym­metrically [Zn—O distances of 2.058 (2) and 2.362 (3) Å], while the two Zn—N bond distances are equal as imposed by symmetry [2.079 (2) Å]. The crystal structure is supported by a number of weak C—H⋯O inter­actions and C—H⋯π contacts, with no π–π inter­actions present, mainly hindered by the substituent methyl groups and the relative mol­ecular orientation. The result is a three-dimensional structure in which each mol­ecule is linked to eight different neighbors.
PMCID: PMC3515128  PMID: 23284355
2.  3-Methyl-5-methyl­sulfanyl-1,3,4-thia­diazole-2(3H)-thione 
The title compound, C4H6N2S3, has two very similar mol­ecules per asymmetric unit. The nine non-H atoms in each mol­ecule are coplanar, both having comparable r.m.s. deviations of 0.002 Å. The main inter­est in the rather simple structure resides in a survey of very weak (in some cases, borderline) non-bonding inter­actions of various kinds, viz. S⋯S, C—H⋯π, π–π [centroid–centroid distance = 3.8958 (13) Å] and C—S⋯π [3.7271 (11) Å], which act as the major driving force for the arrangement of mol­ecules in the structure. The role of long, though highly directional, S⋯S contacts (d > 3.60 Å), and their relevance to the stability of the structure is discussed.
PMCID: PMC3470395  PMID: 23125808
3.  Benzyl 3-[(E)-(furan-2-yl)methyl­idene]-2-methyldithio­carbazate 
In the title compound, C14H14N2OS2, the furan ring exhibits rotational disorder over two orientations, with an occupancy ratio of 0.508 (7):0.492 (7). The furan and phenyl rings form dihedral angles of 8.2 (6) (major occupancy component), 14.8 (6) (minor occupancy component) and 73.65 (9)°, respectively, with the central residue (C4N2S2), indicating a twisted conformation for the mol­ecule. The methyl group and the thione S atom are syn and the conformation about the imine bond is E. In the crystal, C—H⋯π inter­actions involving the phenyl ring are observed.
PMCID: PMC3435764  PMID: 22969635
4.  Methyl 3-(2-hy­droxy­benzyl­idene)-2-methyl­dithio­carbazate 
In the title compound, C10H12N2OS2, the thione and S-methyl groups are syn. An intra­molecular bifurcated O—H⋯(S,N) hydrogen bond occurs.
PMCID: PMC3344635  PMID: 22590397
5.  Chloro­bis­(naphthalen-1-yl)phosphane 
In the title compound, C20H14ClP, the dihedral angle between the naphthyl rings is 81.77 (6)°. The crystal packing suggests weak π–π stacking inter­actions between the naphthyl rings in adjacent units [minimum ring centroid separation 3.7625 (13) Å].
PMCID: PMC3200679  PMID: 22059061

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