42491-33-8Relevant articles and documents
Phosphacycloalkyldiones: synthesis and coordinative behaviour of 6- And 7-member cyclic diketophosphanyls
Pearce, Kyle G.,Simenok, Vladimir,Crossley, Ian R.
, p. 5482 - 5492 (2020/05/16)
Glutaryl and adipoyl chlorides undergo facile condensation with the bis(silyl)phosphanes RP(SiMe3)2(R = Me,nBu,tBu, Ph, Mes) to afford exclusively the phosphacycloalkyldiones (CH2)n(C)2PR (n= 3,4). Characterised spectroscopically and, for R = Ph, Mes (n= 3) crystallographically, the macrocycles are conformationally fluxional in solution and appreciably moisture sensitive. Though seemingly resistant to chemical oxidation at phosphorus, coordination is readily achieved, as illustrated by isolation oftrans-[Pt(PEt3){P(Ph)(CO)2(CH2)3}Cl2] and a series of tungsten pentacarbonyl complexes, which are characterised crystallographically and by infrared and NMR spectroscopy. Together, these data suggest the macrocycles to be relatively weak σ-donors with no appreciable π-acceptor character.
