作者: U. Kunze , R. Merkel , M. Moll
DOI: 10.1016/0022-328X(83)85026-8
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摘要: Abstract The IR and NMR ( 1 H, 31 P, 13 C) spectra of 2-cyano-2-triphenylphosphoranylidene dithioacetic acid some alkyl esters are described. Besides ν(CN) at 2160–2190 cm −1 , an intense absorption band between 1300 1340 with a high ν(CS) share is observed for all α-cyanodithiocarboxylic derivatives. C show large shielding δ(C(1), phenyl) like in arylphosphonium cations J (PC) value the ylide carbon signal which shifted downfield ca. 65 ppm compared to cyanomethylenephosphorane. By treatment α-cyanodithioacetic (LH) or lithium salt (LLi) carbonykmetal halides, chelate complexes cis -(CO) 4 MnL, fac 3 (PPh )MnL [ -Re(μ-L)] 2 obtained. (LR) weak neutral ligands form monocoordinated pentacarbonyl complexes. (CO) 5 W(LR), irradiated W(CO) 6 . coordination site ligand discussed on basis spectra.