Sythesis and Characterization of [(C5R5) M (CO)2 (L2)]+: R=H, Me and Ph; M=Cr and Mo; L2=dmpe and dppe

Author

Brian Dearman

Date of Award

2002

Degree Name

Chemistry

College

College of Science

Type of Degree

M.S.

Document Type

Thesis

First Advisor

Michael P. Castellani

Abstract

For two decades much research has been concentrated on open-shell transition metal complexes as chemical intermediates. To date, most efforts have concentrated on electron deficient, 17-electron (17e) compounds; however past research has shown that electronically supersaturated, 19-electron (19e) complexes can also participate as intermediates in many reactions. Yet, excluding (C₅ H₅)Fe(C₆ H₆) type complexes, very few of these compounds have been prepared.^2,3 To better understand the nature of 19e, the preparation of another series of compounds is desirable.

The addition of the bidentate Lewis bases 1,2- bis(dimethylphosphino)ethane (dmpe) or 1,2-bis(diphenylphosphino)ethane (dppe) to a mixture of [(C₅ R₅)M(CO)₃] _x (X= 2 for R= H, Me, Ph; M = Cr, Mo and X=1 for M=Cr, R=Ph) and [Cp₂ Fe]PF₆, produces [(C₅ R₅)M(CO)₂dmpe]⁺ or [(C₅ R₅)M(CO)₂dppe]⁺ except for M=Cr, R=Ph, respectively (eq 4). (C₅ R₅) M(CO)₃ + L₂ + Cp₂ Fe⁺ → (C₅ R₅) M(CO)₂(L₂) +CO + Cp₂ Fe.

Subject(s)

Inorganic chemistry.

Organometallic chemistry.

Recommended Citation

Dearman, Brian, "Sythesis and Characterization of [(C5R5) M (CO)2 (L2)]+: R=H, Me and Ph; M=Cr and Mo; L2=dmpe and dppe" (2002). Theses, Dissertations and Capstones. 560.
https://mds.marshall.edu/etd/560