- Phosphacycloalkyldiones: synthesis and coordinative behaviour of 6- And 7-member cyclic diketophosphanyls
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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.
- Pearce, Kyle G.,Simenok, Vladimir,Crossley, Ian R.
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p. 5482 - 5492
(2020/05/16)
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- Organometalphosphine-Substituted Transition Metal Complexes, XXVI Dicarbonyl Nitrosyl Organometal Phosphine Cobalt Complexes
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The reactions of tricarbonyl nitrosyl cobalt with tri-tert-butylphosphine, di(tert-butyl)-trimethylsilyl-, germyl-, stannylphosphine, tert-butyl-bis(trimethylsilyl)-, -(germyl)-, -(stannyl)phosphine, as well as with tris(trimethylsilyl)-, -(germyl)-, and -(stannyl)phosphine result in the elimination of one CO-ligand and the formation of corresponding dicarbonyl-nitrosyl-organometal phosphine cobalt complexes.The NMR spectra of the products are reported and discussed. - Keywords: Organometal Phosphines, Dicarbonyl-nitrosyl Cobalt Complexes, NMR Spectra
- Schumann, Herbert,Meissner, Manfred
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p. 594 - 598
(2007/10/02)
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