Synthesis and conformational studies of (diphenylphosphinoamino)-cyclodiphosph(III)azanes
作者:Rodney Keat、Liam Murray、David S. Rycroft
DOI:10.1039/dt9820001503
日期:——
hosph(III)azanes, [(Ph2P)RNPNBut]2[R = Me or Et (cis- and trans-isomers); R = Pri or But(cis-isomers)], have been prepared by the reactions of N-lithiated alkyl-N-(diphenylphosphino) amines, N (PPh2)(R)(Li), with 2-cis-4-dichloro-1,3-di-t-butylcyclodiphosph(III)azane, (ClPNBut)2, in benzene solution. Hydrogen-1, 13C and 31P n.m.r. spectroscopy show that these compounds are cyclodiphosph(III)azenes
一系列2,4-双(二苯基膦基烷基氨基)-1,3-二叔丁基环二磷(III)氮烷,[(Ph 2 P)RNPNBu t ] 2 [R = Me或Et(顺式和反式异构体) ; R = Pr i或Bu t(顺式异构体)],是通过N-烷基化的烷基-N-(二苯基膦基)胺N(PPh 2)(R)(Li)与2-顺式- 4-二氯-1,3-二叔丁基环二磷(III)氮烷(ClPNBu t)2在苯溶液中。氢1、13 C和31P NMR光谱表明,这些化合物是cyclodiphosph(III)azenes而不是亚磷(膦III)azenes,(PH 2 P)RNP NBU吨,在溶液中,和可变温度3升P NMR数据已启用的优选构象外-P要识别的-NP骨架。在的情况下,[(PH 2 P)RNPNBu吨] 2(R = PR我和BU吨)多于一种构象异构体可以在低于环境温度进行区分。