摘要
化合物 ( 1 ) [(CO) 4 Mo(SPh) 2 Mo(CO) 4 ]同羧酸L反应得到桥羧基配体的羰基钼 (Ⅰ )化合物 [Bu4N ][(CO ) 3Mo(SPh) 2 LMo (CO3) ](L =CF3COO ,HCOO ,CH3COO ,C2 H5COO ,OOCCH2 CH2 COO ,Me3COO) ,在室温下测定了它们的1 H ,1 3C ,95MoNMR谱 ,由于配位基团、对称性及Mo Mo键长等结构的变化 ,两者的谱线差别很大 ,特别是95MoNMR更为敏感 ,即使是不同的羧基也会影响它的化学位移和线宽 ,其屏蔽和线宽的顺序是Me3COO- 1 >C2 H5COO- 1>CH3COO- 1 >HCOO- 1 >F3COO- 1 .
Carbonylmolybdenum(Ⅰ) compounds with bridge carboxyl group ligand \\[(CO)\-3Mo(SPh)\-2LMo(CO)\-3\](L=CF\-3COO,HCOO,CH\-3COO,C\-2H\-5COO,OOCCH\-2CH\-2COO,Me\-3COO), are synthesized by the reaction of Compound \[(CO)\-4Mo(SPh)\-2Mo(CO)\-4\] and carboxyl acids L the \{\}\+1H, \{\}\+\{13\}C, \{\}\+\{95\}Mo NMR spectra of 7 carbonylmolybdenum compounds have been determined in room tempurate. The diffence between the spectra of reactant and product is obvious because of the chonge of the structral charge of the ligands, symmetrization, bond distances. Especially, the influence of carboxyl goup on chemical shifts and linewidth for \{\}\+\{95\}Mo NMR is sensitive. The shielding and widening order is Me\-3COO\+\{-1\}>C\-2H\-5COO\+\{-1\}>CH\-3COO\+\{-1\}>HCOO\+\{-1\}>F\-3COO\+\{-1\}. \;
出处
《波谱学杂志》
CAS
CSCD
北大核心
2000年第4期277-282,共6页
Chinese Journal of Magnetic Resonance
关键词
桥羧基配体
羰基钼(Ⅰ)化合物
NMR
Bridge carboxyl group ligand, Carbonylmolybdenum(Ⅰ) compounds, NMR
