Formation of large chelate rings and cyclometallated products from diphosphines of type Bu<sup>t</sup><sub>2</sub>P(CH<sub>2</sub>)<sub>n</sub>PBu<sup>t</sup><sub>2</sub>(n= 5–8) and Ph<sub>2</sub>P(CH<sub>2</sub>)<sub>5</sub>PPh<sub>2</sub>with palladium and platinum chlorides: factors affecting the stability and conformation of large chelate rings
作者:Najeeb A. Al-Salem、H. David Empsall、Richard Markham、Bernard L. Shaw、Brian Weeks
DOI:10.1039/dt9790001972
日期:——
31P n.m.r. spectroscopy the large-chelate mixed compounds described in this and previous papers, containing PBut2 groups in ‘corner’ positions, are shown to be stable in solution relative to open-chain structures. The complexes trans-[Pd2Cl4Ph2P(CH2)5PPh2}2] and cis-[Pt2Cl4Ph2P(CH2)5PPh2}2] are described. The literature on large-chelate-ring compounds is surveyed. Factors affecting the stability and
新的二膦卜吨2 P(CH 2)Ñ PBU吨2(Ñ = 5-7)中描述和先前已知的博士2 P(CH 2)5 PPH 2特征更加充分。的化合物中,卜吨2 P(CH 2)Ñ PBU吨2(Ñ = 5-8)与[反应的PdCl 2(NCPH)2 ],得到的类型的结晶复合物[的PdCl 2 [卜吨2 P(CH 2)n PBu吨2 ]} X ],其中X为= 2 Ñ = 5,7,或8个但未知为Ñ = 6同样对于Ñ = 5挥发性环金属化配合物[[图形省略]卜吨2)]的形成。与[氯铂酸2(NCPH) 2 ]或[氯铂酸2(NCBu吨) 2 ],卜吨2 P(CH 2) 5 PBU吨2给出反式- [氯铂酸2 [卜吨2 P(CH 2) 5 PBU Ť2 ]} X ]( X是未知的)和环金属化产物[[图形省略]卜吨2)](X = Cl)的由一个非常相似物种污染,可能[[图形省略]卜吨2)]从该无法分离。络合物[氯铂酸2