Lithio-di-t-butylfluorsilylphenylphosphan; im Kristall ein (SiFLiP)2-Achtring

Stalke, Dietmar; Meyer, Matthias; Andrianarison, Mbolatiana; Klingebiel, Uwe; Sheldrick, George M.

doi:10.1016/0022-328X(89)87193-1

Lithio-di-t-butylfluorsilylphenylphosphan; im Kristall ein (SiFLiP)2-Achtring

Date Issued

1989

Author(s)

Stalke, Dietmar

Meyer, Matthias

Andrianarison, Mbolatiana

Klingebiel, Uwe

Sheldrick, George M.

DOI

10.1016/0022-328X(89)87193-1

Abstract

Di-t-butylfluorosilylphenylphosphane (I) reacts with CMe3Li to give the lithium compound [(CMe3)2SiFLi(THF)2PC6H5]2 (II) and butane. The crystal structure of II has been determined. The Si---P bond length (217.1 pm) in the eight-membered ring is extremely short. The Si---P spin coupling constant (84.12 Hz) in II is remarkably large. LiF elimination from II leads to the formation of the four-membered (Si---P) ring III. The bis(fluorosilyl)phosphane IV is formed in the reaction of II with Me2SiF2.