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- Title
A phosphenium cation supported by a seven-membered thiophene based ring system.
- Authors
Price, Jacquelyn T.; Jones, Nathan D.; Ragogna, Paul J.
- Abstract
A novel diamine ligand containing a simple thiophene ring in the backbone has been synthesized. Substitution at the nitrogen atoms with either 2,4,6-trimethylphenyl (Mes) or 2,6-diisopropylphenyl (Dipp) was varied via a condensation reaction between the corresponding aniline and 3,4-diformylthiophene, giving two different ligand derivatives. In onwards chemistry that targeted the cyclic diaminochlorophosphines, the substitution at phosphorus was dependent on the ligand used. For example, when a stoichiometric reaction between PCl3 and thiophene-3,4 diyldimethaneamine (R = Mes) was carried out, the synthesis of a bis-substituted diphosphino- product was isolated. If the R = Dipp ligand derivative was employed, both a 2:1 and 1:1 stoichiometric reaction between PCl3 and the diamine was observed. Nevertheless, the cyclic diaminochlorophosphine (i.e., 1:1 stoichiometry) for R = Dipp was isolated in high yields and the synthesis of the corresponding phosphenium cation was achieved and structurally characterized.
- Subjects
THIOPHENE derivatives; DIAMINES; CONDENSATION reactions; STOICHIOMETRY; PHOSPHINE derivatives; PHOSPHENES
- Publication
Canadian Journal of Chemistry, 2013, Vol 91, Issue 8, p691
- ISSN
0008-4042
- Publication type
Article
- DOI
10.1139/cjc-2013-0015