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RESEARCH FRONT
Contents Vol 68(9)

Syntheses of Iron(0) Complexes of Symmetrical Trialkylphosphines with Three Terminal Vinyl Groups, P((CH2)mCH=CH2)3

Georgette M. Lang A , Dirk Skaper B , Takanori Shima B , Michael Otto B , Leyong Wang B and John A. Gladysz A B C
+ Author Affiliations
- Author Affiliations

A Department of Chemistry, Texas A&M University, PO Box 30012, College Station, TX 77843-3012, USA.

B Institut für Organische Chemie and Interdisciplinary Centre for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 42, 91054 Erlangen, Germany.

C Corresponding author. Email: gladysz@mail.chem.tamu.edu

Australian Journal of Chemistry 68(9) 1342-1351 https://doi.org/10.1071/CH15178
Submitted: 13 April 2015  Accepted: 21 April 2015   Published: 27 May 2015

Abstract

Reactions of (BDA)Fe(CO)3 (BDA = benzylideneacetone) and P((CH2)mCH=CH2)3 (1; m = 4, a; 5, b; 6, c; 7, d; 8, e) give the trigonal bipyramidal bis(phosphine) complexes trans-Fe(CO)3(P((CH2)mCH=CH2)3)2 (2a–e) as moderately air-sensitive yellow-orange oils in 60–75 % yields after workup. These and NO+BF4– react to give the cationic iron dicarbonyl nitrosyl complexes trans-[Fe(CO)2(NO)(P((CH2)mCH=CH2)3)2]+BF4– (3a–e; orange oils, 88–98 %). Further substitution is effected with n-Bu4N+X– (X = Cl, Br, I, or CN) to give trans-Fe(CO)(NO)(X)(P((CH2)mCH=CH2)3)2 (4a–e-X; red oils, 73–93 %). The NMR (1H, 13C, 31P) and IR properties of these adducts, which provide precursors to gyroscope-like complexes by intramolecular C=C metatheses, are analysed in detail.


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