Chin. J. Org. Chem. ›› 2017, Vol. 37 ›› Issue (1): 176-184.DOI: 10.6023/cjoc201608013 Previous Articles     Next Articles

ARTICLE

OsXCl(PPh3)3(X=H,Cl)与炔丙基氯反应合成烯基卡拜配合物及膦配体调控的锇-氢卡拜向卡宾配合物的转化

杨玉, 蔡涛, 温庭斌   

  1. 厦门大学化学化工学院化学系 厦门 361005
  • 收稿日期:2016-08-18 修回日期:2016-09-04 发布日期:2016-09-06
  • 通讯作者: 温庭斌 E-mail:chwtb@xmu.edu.cn
  • 基金资助:

    国家重点基础研究发展计划(973计划,No. 2012CB821600)和国家自然科学基金(No. 21072161)资助项目.

Alkenylcarbyne Complexes Derived from the Reactions of OsXCl-(PPh3)3(X=H,Cl) with Propargyl Chloride and Phosphine Ligand-Controlled Transformation of Hydride-Carbyne to Carbene

Yang Yu, Cai Tao, Wen Tingbin   

  1. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005
  • Received:2016-08-18 Revised:2016-09-04 Published:2016-09-06
  • Supported by:

    Project supported by the National Basic Research Program of China(973 Program, No. 2012CB821600) and the National Natural Science Foundation of China(No. 21072161).

Reactions of the simple osmium precursors OsHCl(PPh3)3(1) or OsCl2(PPh3)3(2) with 3-chloro-3-methylbut-1-yne afforded OsHCl2(≡CCH=CMe2)(PPh3)2(3) or OsCl3(≡CCH=CMe2)(PPh3)2(4),respectively.Treatment of 3 with Ph2PC≡CPh led to the formation of the tris-diphenyl(phenylethynyl) phosphine alkenylcarbene complex OsCl2(=CHCH=CMe2)(Ph2PC≡CPh)3(5),while complex 4 underwent simple phosphine ligand substitution with Ph2PC≡CPh to give OsCl3(≡CCH=CMe2)(Ph2PC≡CPh)2(6).Presumably,upon the phosphine ligand substitution of PPh3 in 3 by Ph2PC≡CPh,the relatively electron-poor nature of the later decreased the electron density of the osmium center,and thus promoted the transformation of the hydride-carbyne to carbene via the 1,2-shift of the hydride ligand from Os to the carbyne carbon,which was then further facilitated by the coordination of a third less bulky Ph2PC≡CPh ligand to the osmium center to give the stable 18e product 5.

Key words: osmium, carbyne, carbene, diphenyl(phenylethynyl) phosphine, propargyl chloride