Dono r-stab ilized hyper coordinated silic on (IV) chelat es wi th cyclohe xylid en eimino-N ligand gr ou p: Rol e of substi tuents on i oni zatio n (original) (raw)

N - C yclo hexyli den eimino- O -(trime t h yl s ily l) acylimid ates react smoothly with XSiCl3 (X = M e , Ph, v i nyl and C l) i n a transsi lyla tion re actio n pr od ucing ionic pentacoord inate b ischelates and neutral hexaco ordi - nat e d co mplexes de pe n ding o n the e lectronic and s teric b ehavior of the lig ands . These hyp ercoord inated si licon co mplexes are cha racte rized by UV–V is , FT- IR and N MR s pectroscop i c techni ques. A neutral hexa- coordi nate sil icon comple x with dich lor o ligands was char acter iz ed by s ingle cry stal X- ray analy sis. The UV–Vi s ab sor pti on da ta sh owed a sig nificant bathochr omic s hift of k max in hyp e r c o o rd inat e d s i li c o n c o m - plexes on com p ar is o n with th e ir co rres ponding hydr azide lig ands . The 29Si N M R che m i cal shifts s tro ngl y de pend on n atur e of X gro up directly attached to the central s ilicon atom towar d io nizati o n.

Loading...

Loading Preview

Sorry, preview is currently unavailable. You can download the paper by clicking the button above.