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1.  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.
doi:10.1107/S1600536812040147
PMCID: PMC3470395  PMID: 23125808
2.  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.
doi:10.1107/S160053681201731X
PMCID: PMC3344635  PMID: 22590397
3.  5-Hy­droxy-3-methyl-5-phenyl-4,5-di­hydro-1H-pyrazole-1-carbothio­amide 
In the title compound C11H13N3OS, the aromatic ring and the dihydro­pyrazole ring are oriented orthogonally with respect to each other, making a dihedral angle of 89.92 (9)°. An intra­molecular O—H⋯S hydrogen bond occurs. In the crystal, weak N—H⋯N and N—H⋯S hydrogen bonds link the mol­ecules into a columnar stack propagating along the b axis.
doi:10.1107/S1600536811036658
PMCID: PMC3201317  PMID: 22065480

Results 1-3 (3)