Coordination of P(X)-modified (X=O, S) N-aryl-carbamoylmethylphosphine oxides and sulfides with Pd(II) and Re(I) ions: Facile formation of 6,6-membered pincer complexes featuring atropisomerism
作者:V.Yu. Aleksenko、E.V. Sharova、O.I. Artyushin、D.V. Aleksanyan、Z.S. Klemenkova、Yu.V. Nelyubina、P.V. Petrovskii、V.A. Kozlov、I.L. Odinets
DOI:10.1016/j.poly.2012.12.025
日期:2013.3
namely, P(X)-modified carbamoylmethylphosphine oxides (CMPO) and sulfides (CMPS) 2a–d. In reactions with Re(CO)5Br (in the presence of Et3N) and (PhCN)2PdCl2 these ligands afforded κ3-XNY (X,Y = O,S) Re(I) (4a,d) and Pd(II) (6b–d) pincer complexes with two fused six-membered metallocycles, owing to ready metallation at the amide nitrogen atom. In the absence of a base, the interaction of 2a with the
用原位生成的Ph 2 P(O)CH 2 C(O)Cl直接乙酰化(硫代)磷酸化苯胺1a,b或用氯乙酰氯和Ph 2 PSNa顺序处理1a,b产生新的寡齿配体,即P(X)修饰的氨基甲酰基甲基氧化膦(CMPO)和硫化物(CMPS)2a - d。在随Re(CO)反应5 Br(上中的的Et存在下3 N)和(PHCN)2的PdCl 2,这些配体,得到κ 3 - XNY(X,Y = O,S)Re(I)(4a,d)和Pd(II)(6b - d)钳形配合物,带有两个稠合的六元金属环,这是由于在酰胺氮原子上易于金属化所致。在不存在碱的,相互作用图2a具有相同的前体铼得到至十元κ 3 - OO金属环5以Re(I)离子仅通过磷酰基协调。根据NMR光谱数据,所获得的络合物在室温下在溶液中形成稳定的阻转异构体。化合物2a,b的固态结构 并通过X射线晶体学表征所得的金属环。