Complexes of the type [M(CO)5}2L] (M = Cr or W, L = RS(CH2)2SR, R = Me and n = 6, R = Et and n = 2 or 4; M = W, R = Me or t-Bu and n = 2), [M(CO)5L] (M = Cr or W, L = MeSCH2Ph; M = Cr, L = EtS(CH2)2SEt) and [M(CO)4L] (M = Cr, Mo or W, L = EtS(CH2)2SEt) have been isolated and characterised by i.r., u.v.-visible and 1H n.m.r. spectroscopy. The bonding of alkyl sulphide ligand to group 6metal carbonyls
Ditelluroether complexes of Group 6 metal carbonyls: synthesis, spectroscopic studies and a comparison with dithio- and diseleno-ether analogues
作者:Andrew J. Barton、William Levason、Gillian Reid
DOI:10.1016/s0022-328x(99)00005-4
日期:1999.5
MeSe(CH2)3SeMe or o-C6H4(SeMe)2) analogues. The complexes have been characterised by IR, 1H-, 13C1H}-, 77Se1H}-, 125Te1H}- and 95Mo-NMR spectroscopy, FAB mass spectrometry and analysis. The structure of [Cr(CO)4MeSe(CH2)2SeMe}] is reported. Comparison of the spectroscopic data reveals that ditelluroethers are significantly better σ-donors towards low valent metal centres than their lighter analogues.
[M(CO)4(LL)](M = Cr,Mo或W,L WL = MeTe(CH 2)3 TeMe,PhTe(CH 2)3 TePh或o -C 6 H 4的合成(TeMe)2)以及一些二硫醚(LLMeS(CH 2)2 SMe,MeS(CH 2)3 SMe)和二硒醚(LL= MeSe(CH 2)2 SeMe,MeSe(CH 2)3 SeMe或o -C 6 H 4(SeMe)2)类似物。该复合物的特征在于IR,1 H-,13 C 1 H}-,77 Se 1 H}-,125 Te 1 H}-和95 Mo-NMR光谱,FAB质谱和分析。报道了[Cr(CO)4 MeSe(CH 2)2 SeMe}]的结构。光谱数据的比较表明,相对于较轻的类似物,二硬脂酸醚对低价金属中心的σ-供体要好得多。