Nickel complexes of 1-methylimidazoline-2(3H)-thione: crystal structures of trans-dichlorotetrakis(1-methylimidazoline-2(3H)-thione)nickel(II) and tetrakis[1-methylimidazoline-2(3H)-thione]nickel(II) tetrafluoroborate

Summary Crystal structures have been determined for two nickel complexes of the monodentate S-donating ligand 1-methyl imidazoline-2(3H)-thione (mimtH). The parainagnetic trans-octahedral complex, [Ni(mimtH)₄Cl₂], crystallises in an orthorhombic unit cell (a=12.459(1),b=13.078(1),c=15.406(1)Å, V=2510.24ų,Z=4, space group Pbca). Final conventional R from 1848 observed data [F>4(F)] is 0.0273. The Ni–Cl distance is. 2.537(1) Å and the mean Ni–S distance is 2.479 Å.The diamagnetic complex, [Ni(mimtH)₄](BF₄)₂, contains a distorted square-planar cation which is H-bonded. to [BF₄]^– anions. The complex crystallises in an orthorhombic unit cell [a=9.810(1),b=14.585(1),c=20.120(2)Å, V=2878.8ų,Z=4, space group Pbcn]. Final conventional R from 1756 observed data [F>4(F)] is 0.0629. The average Ni–S distance is 2.216Å.     

Chemistry of azobenzazole systems. 1. Synthesis and structure of oxazolo[4,5-b]-pyridine-2(3H)-thione and its oxygen analog

We have synthesized oxazolo[4,5-b]pyridine-2(3H)-thione by reaction of 2-hydroxy-3-aminopyridine with potassium ethylxanthogenate. The structure has been confirmed by PMR, IR, and mass spectra. The thione form was established with the help of x-ray diffraction and PMR spectroscopy. Institute of Phytochemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent 700170. Interbioskrin AOZT [Closed Joint-Stock Company], Moscow, a/ya 218, 121019. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1545–1548, November, 1997.     

Bis[1-hydroxypyridine-2(1H)-thion­ato-S,O]copper(II)

The crystal structure of the widely used title fungicidal material, [Cu(C₅H₄NOS)₂], has been determined at 150 (2) K from a microcrystalline fragment using synchrotron radiation. The mol­ecule adopts a trans-square-planar configuration, with the Cu atom sited at a crystallographic centre of inversion.     

The crystal and molecular structure of chlorobis(N-ethyl-1 3-imidazolidine-2-thione)copper(I)

Summary The crystal structure of the title compound has been determined from x-ray diffractometer data by the heavy-atom method and refined anisotropically by least-squares calculations. Crystals are monoclinic, space groupP 2₁/c, with unit cell dimensions:a=7.321(1),b=14.622(2),c=14.827(2) Å,=92.95(2), Z=4. The finalR index is 4.6%. The copper coordination is trigonal, involving the sulphur atoms of twoN-ethyl-1,3-imidazolidine-2-thione molecules and one chlorine atom. The structure is held together by two intramolecular N-HCl hydrogen bonds and by normal van der Waals interactions.