1,721,003 research outputs found
Multiple arylations of aromatics via removable palladacycle scaffolds: polycyclic compounds and their way of formation
No full textTrans influence of triphenylphosphines and pseudohalogens on Ni-S bonds: Synthesis, spectral and single crystal X-ray structural studies on NiS2PN and NiS2PC chromophores
No full textTrans influence of triphenylphosphines and pseudohalogens on Ni-S bonds of NiS2PN and NiS2PC chromophores has been investigated by synthesizing and characterizing them. The complexes show the characteristic thioureide IR band at similar to 1530 cm(-1). Electronic spectrum of the cyanide analogue shows a strong blue shift relative to others. X-ray structures of [Ni(pipdtc)(4-MP)(NCS)] (1), [Ni(pipdtc)(PPh3)(NCS)] (2) and [Ni(pipdtc)(PPh3)(CN)] (3) (pipdtc = piperidinecarbodithioate anion, 4-MP = tri(4-methylphenyl)phopshine) are reported. Ni-S bond distance trans to 4-MP(1) is longer than the distances in (2) and (3) and Ni-S bond distances trans to Ni-NCS/CN decrease as follows: (3) > (2) > (1). Particularly, 4-MP shows a highly significant trans influence than triphenylphosphine on Ni-S bond. Similarly, CN- exerts a marginally significant trans influence compared to NCS-. Thioureide C-N distances are relatively very short due to the drift of electron density towards the metal. The Ni-N-C angle (163.5(2)A degrees) observed in (2) indicates deviation from linearity to a larger extent compared to that in (1) (176.3(3)A degrees) due to the steric effect of the 4-methyl group. The reduction potentials (CV) for the mixed ligand complexes are much less compared to that of the parent NiS4 chromophore due to the pi-acidic phosphines
Synthesis, spectral and cyclic voltammetric studies on (4,4′-bipyridyl)bis(di(2-hydroxyethyl)dithiocarbamato)zinc(II) and (4,4′-bipyridyl)bis(bis(N-methyl, N-ethanoldithiocarbamato)zinc(II) and their X-ray crystal structures
No full textSynthesis, spectral and single crystal structure determination of [1,3-bis(diphenylphosphino-kP,P′)propane(4-morpholinecarbodithioato-S,S′) nickel(II) perchlorate and [1,4-bis(diphenylphosphino-kP,P′)butane (4-morpholinecarbodithioato-S,S′)nickel(II) perchlorate complexes
No full text[Ni(mdtc)(1,3-dppp)]ClO4 (1), and [Ni(mdtc)(1,4-dppb))ClO4 (2) [(mdtc(-) = 4-morpholinecarbodithioato anion. 1,3-dppp = 1,3-bis(diphenylphosphino)propane, 1.4-dppb = 1.4-bis(diphenylphosphino)butane)] have been prepared from their parent dithiocarbamate. The planar complexes were characterized by electronic and IR spectra. Single crystal X-ray structures of compounds 1 and 2 were determined. Both the complexes have planar NiS2P2 chromophores in keeping with the observed diamagnetism. Ln complexes 1 and 2 the Ni-S and Ni-P distances are symmetric. The thioureide C-N distances of both the complexes show a decreasing trend compared to the C-N distance in the parent Ni(mdtc),. The resulting P-Ni-P angles are higher in both the complexes (96.5(1)degrees in 1. 101.4(8)degrees in 2) due to puckering of propane and the butyl alkyl chain associated with 1,3-dppp and 1,4-dpppb
A Novel Hydrogen-Bonded Duplex Made up of Water Molecules and Halide Ions in the Sandwich Inclusion Structures of (C10H8N3S)+ X 2H2O [X=Cl-, Br-].
No full textThe X-ray crystal structures of thiabendazolium halide dihydrates (C10H8N3S)(+). X . 2H(2)O [X = Cl-, Br-] 1, 2 reveal a novel hydrogen-bonded duplex consisting of alternate edge-sharing (H2O . X)(2) quadrilaterals and (2H(2)O . X)(2) hexagons; notably these duplexes exist as host lattices and sandwich thiabendazole molecules into two different supramolecular architectures by similar N ... X and N ... O hydrogen bonds
Conformational pseudo-polymorphism and hydrogen bonding: benzthiazide anhydrate and monohydrate, an antihypertensive drug
No full textCrystal structures of benzthiazide [6-chloro-3-[[(phenylmethyl)thio]ethyl] 4H-1,2,4-benzthiadiazine-7-sulfonamide-1,1,dioxide] in its anhydrate and monohydrate forms reveal, respectively, a J-like folded as well as extended type conformations that have critical torsional flexibility along the C-C-S-C bonds and novel H-bonded sulfonamide motifs
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