Cyclopalladation versus hydroxylation. A case of pH dependence
作者:Joydev Dinda、Debasis Das、Prasanta Kumar Santra、Chittaranjan Sinha、Larry R. Falvello
DOI:10.1016/s0022-328x(01)00787-2
日期:2001.6
structure of the hydroxylated blue product is also supported by a single crystal X-ray crystal structure of Pd(NaiEtO)Cl (5b). The reaction of Pd(NaiR)Cl2 in MeCN with dilute sodium hydroxide in air, or aqueous silver nitrate under boiling conditions, or its treatment with Tollen's reagent in MeCN solution under ambient conditions has also yielded the hydroxylated product. All the compounds have been characterised
1-烷基-2-(萘基- α-偶氮)咪唑(奈尔,2)(C 10 H ^ 7 NNC 3 ħ 2 Ñ 2 1R; R =我(一)等(b) ,PhCH 2(c))已与Na 2 PdCl 4在MeOH或Pd(MeCN)2 Cl 2的MeCN溶液中反应,合成了Pd(NaiR)Cl 2(3)。Pd(OAc)2在沸腾的苯中与NaiR的反应,然后添加LiCl,导致合成了环钯配合物Pd(NaiRH)Cl(4)。配体NaiR充当N,N'-双齿螯合剂,而NaiRH充当三齿N,N ',C-环金属配体。的红外光谱3显示出2PdCl延伸对应于CIS -PdCl 2的几何形状,并且一个单一ν在(PdCl)频带4表明一个PdCl键。Pd(NaiEtH)Cl(4b)的单晶X射线晶体结构研究支持了环钯化,并且金属化发生在C(8')位。Pd(NaiR)Cl 2(3)的溶液也不可逆地转化为Pd(NaiRH)