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Synthesis and characterization of iron(II) complexes of 10- and 11-membered triphosphamacrocycles

Battle, Andrew Raymond, Edwards, Peter Gerald, Haigh, Robert, Hibbs, David Edward, Li, Dong-Mei, Liddiard, Sam M. and Newman, Paul David 2006. Synthesis and characterization of iron(II) complexes of 10- and 11-membered triphosphamacrocycles. Organometallics 26 (2) , pp. 377-386. 10.1021/om060798g

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Abstract

The complex [(η5-Me3SiC5H4)Fe(10aneP3-H2,C2H3)]+, where Me3SiC5H4 is trimethylsilylcyclopentadienyl and 10-aneP3-H2,C2H3 is 1-vinyl-1,4,8-triphosphacyclodecane, has been prepared by the base-catalyzed template cyclization of 1,3-bis(phosphino)propane (1,3-bpp) and trivinylphosphine (tvp) at the metal center. A related radical-initiated iron-template reaction between 1,2-bis(phosphino)ethane (1,2-bpe) and triallylphosphine (tap) gave [(η5-C5Me5)Fe(Me-10aneP3-H2,C3H5)]+, where C5Me5 is 1,2,3,4,5-pentamethylcyclopentadienyl and Me-10aneP3-H2,C3H5 is the unsymmetric 10-aneP3 derivative 1-allyl-3-methyl-1,4,7-triphosphacyclodecane. This macrocycle is the result of two intramolecular hydrophosphination reactions, one that generates a five-membered (chelate) ring with an exo-methyl group and one a six-membered chelate. The [(η5-CpR)Fe]+ fragment also controls the cyclization of 1,2-bis(diallylphosphino)ethane with phenylphosphine to give a ternary complex containing the symmetrical 11-membered macrocycle 1-phenyl-4,8-diallyl-1,4,8-triphosphacycloundecane, in addition to the unsymmetrical 10-aneP3 derivative.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: American Chemical Society
ISSN: 02767333
Last Modified: 04 Jun 2017 01:40
URI: http://orca.cf.ac.uk/id/eprint/1498

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