18898-57-2Relevant academic research and scientific papers
Organometallic radical-initiated carbon-sulfur bond cleavage and carbon-carbon coupling in dithiocarbamate and thiocarbenoid cyclopentadienylchromium complexes
Goh, Lai Yoong,Weng, Zhiqiang,Hor, Andy T.S.,Leong, Weng Kee
, p. 4408 - 4414 (2002)
Cothermolysis of the dithiocarbamate complex CpCr(CO)2(S2CNEt2) (2b) with [CpCr(CO)3]2 (1) in toluene at 110 °C for 2 h led to the isolation of a yellowish red low-melting solid of CpCr(CO)2(CNEt2) (3b; 6%), a dark red viscous liquid of CpCr(CO)2(SCNEt2) (4b; 19%), dark red crystalline solids of CpCr(CO)2(η2(C,O)-C(O)C(NEt2)CH(NEt2 )) (5b; 4%), dark green solids of Cp4Cr4S4 (30%), dark brown solids of the double cubane Cp6Cr8S8(C(S)NEt2)2 (6b; 13%), and blue solids of Cr(S2CNEt2)3 (8b; 9% yield). Except for 5b, the same product composition (3b, 11%; 4b, 14%; 6b, 37%; Cp4Cr4S4, 20%) was obtained from a similar thermal treatment of 8b with 1. A similar reaction of the thiocarbenoid complex CpCr(CO)2(SCNMe2) (4a) yielded yellow crystalline solids of CpCr(CO)2(CNMe2) (3a, 16%), a dark brown solid of Cp4Cr4S2-(CO)(CNMe2) (7a, 36%), Cp4Cr4C4 (10% yield), and Cp2Cr2(CO)4 (17%). Complexes 3a, 5b, and 7a have been characterized by single-crystal X-ray diffraction analysis. The structures of 3a and 5b possess a metal - carbyne and a metal-alkenylacyl moiety, respectively. Complex 7a is a μ3-aminocarbyne cubane complex.
Syntheses of Diethyldithiocarbamate Chelates of Chromium(III) and Molybdenum(V) by Oxidative Decarbonylation
Lancashire, Robert,Smith, Thomas D.
, p. 845 - 846 (1982)
Chromium hexacarbonyl reacts with under nitrogen in refluxing toluene to give with deposition of mercury.This easily oxidised compound was not isolated but work up of the reaction products in air gave .Reaction of with under the same conditions goes through a series of reactions leading to the isolation of MoVO(S2CNEt2)3.
Synthetic and structural study of cyclopentadienylchromium dithiocarbamate complexes and their thermolytic derivatives
Goh, Lai Yoong,Weng, Zhiqiang,Leong, Weng Kee,Leung, Pak Hing
, p. 4398 - 4407 (2008/10/08)
The reaction of [CpCr(CO)3]2 (1) with the tetraalkylthiuram disulfides [R2NC(S)S]2 (R = Me, Et, i-Pr) has been investigated. At ambient temperature, CpCr(CO)2(η2-S2CNR2) (3) was obtained as air-stable dark red crystals in 81-87% yields from reactions in solution and in quantitative yield from a reaction in the solid state (3a, R = Me); the precursor complex CpCr(CO)3(η1-S2CNMe2) (2a) crystallized out in a 1:1 admixture with 3a from a product solution after 3 days at -29 °C. At 90 °C for 2 h, the same reaction or the thermal degradation of 3 led to the isolation of the thiocarbenoid complex CpCr(CO)2(η2-SCNR2) (4) as dark red crystals (ca. 10%), double cubanes Cp6Cr8S8(η2:4-SCNR 2)2 (5a, R = Me; 5b, R = Et) as dark brown crystals (3-7%), Cp6Cr6S8(η1:η?2-S 2CNR) (6) as dark crystals (7-14%), Cr(η2-S2CNR2)3 (7) as dark blue crystals (16-21%), Cp2Cr2(CO)4S as dark green crystals (1-3%), and Cp4Cr4S4 (12-22%) as dark green solids. The crystal structures of 2-6 were reported. Unprecedented bridging modes were found in the double cubanes: in 5, two Cr4S4 cubane clusters were linked by a μ-η2:η4-dithiooxamide ligand as well as a Cr - Cr bridge with bond distances of 3.101 and 3.118 A? in the two independent molecules of the compound, and in 6, the cubanes were linked by two μ-η1:η2-dithiocarbamate ligands.
Aminomethylene complexes of divalent tungsten and molybdenum
Cook, Darren J.,Hill, Anthony F.
, p. 5616 - 5617 (2008/10/08)
Convenient routes are reported to aminomethylene complexes of divalent molybdenum and tungsten: [M(=CHNiPr2)(CO)2(S2CA)2] (M = Mo, W; A = NMe2, NEt2, N(CH2)4, OEt).
Chromium(III) Dithiocarbamates - A Thin Layer Chromatographic Study and Characterisation of Some New Binuclear Mixed Ligand Dithiocarbamates
Soundararajan, G.,Subbaiyan, M.
, p. 1058 - 1061 (2007/10/02)
When chromium(III) dithiocarbamates are prepared from chromium(VI) species by reduction and complexation with excess ligand, new mixed ligand binuclear dithiocarbamates are formed along with mononuclear chelates , where dtc = dithiocarbamate anion and tds = thiuram disulphide.These new complexes are characterised by different physical methods after separation from mononuclear chelates by preparative column chromatography.
