dienes with these nitrides. The aryl-substituted azaallenium complexes cis-[(terpy)OsCl2(η2(C,N)-R[Ar]CNCHR‘ ‘)]PF6 display hindered rotation about the C−Cipso bond, because π-stacking interactions favor a close approach of the aryl group to the terpyridine ligand. The osmium migrates slowly between the two CN bonds of the azaallenium ligands, leading to both regio- and stereoisomerizations. These two processes
阳离子氮化((VI)配合物顺式-[((terpy)OSNCl 2 ] PF 6(1;terpy = 2,2':6',2''-
吡啶)与多种芳基取代的烯烃反应,并成环且无环环状二烯以形成η 2 -azaallenium络合物顺- [(三联
吡啶)OSCL 2(RR'C ñ CHR”“)] PF 6(2)由净氮原子插入一个C C双键。富含电子的烯烃更具反应性,而诸如
肉桂酸酯的贫电子烯烃则不会发生反应。等规反式-[[(terpy)OSNCl 2 ] PF 6(3),以及三(
吡唑基)
甲烷络合物[(Tpm)OSNCl 2 ] PF 6(4),虽然反应范围限于具有这些
氮化物的二烯,但生成的产物相似。的芳基取代azaallenium络合物顺- [(三联
吡啶)OSCL 2(η 2(C ^,Ñ)-R(AR)ç Ñ CHR”“)] PF 6显示受阻关于C-C旋转本位键,因为π-堆积相互作用有利于芳基与叔
吡啶配体的