The reaction of CoCl2.6H(2)O and PNP [PNP = 1,1-bis(diphenylphosphinoethyl)-n-propylamine (CH3CH3CH3)-N(CH2CH2PPh2)(2)] in ethanol affords the blue Co(II) complex [CoCl3{eta(1)-PPPh2CH2CH2N(CH2CH2CH3)(H)-(CH2CH2P(O)Ph-2)}] (1), which has been characterized by spectroscopic methods and X-ray diffraction analysis. The structure of 1 consists of a tetrahedral cobalt atom coordinated by three chlorides and by an eta(1)-P-PNP ligand bearing a dangling P=O end and quaternised at the nitrogen atom. EPR measurements and a detailed analysis of the magnetic behaviour of I are consistent with a tetrahedral Co(II) ion and accordingly support the protonation of the PNP nitrogen atom. A mechanistic picture accounting for the formation of 1 has been proposed from the isolation and characterization of three reaction intermediates along the pathway leading to 1 which involve either eta(2)-P,P- and eta(2)-P,N-PNP cobalt complexes.

Tetrahedral cobalt(II) complexes stabilized by the aminodiphosphine PNP ligand [PNP = CH3CH2CH2N-(CH2CH2PPh2)(2)] / A. Romerosa; C. Saraiba-Bello; M. Serrano-Ruiz; A. Caneschi; V. McKee; M. Peruzzini; L. Sorace; F. Zanobini. - In: DALTON TRANSACTIONS. - ISSN 1477-9226. - STAMPA. - -:(2003), pp. 3233-3239. [10.1039/ b305443h]

Tetrahedral cobalt(II) complexes stabilized by the aminodiphosphine PNP ligand [PNP = CH3CH2CH2N-(CH2CH2PPh2)(2)]

CANESCHI, ANDREA;PERUZZINI, MAURIZIO;SORACE, LORENZO;
2003

Abstract

The reaction of CoCl2.6H(2)O and PNP [PNP = 1,1-bis(diphenylphosphinoethyl)-n-propylamine (CH3CH3CH3)-N(CH2CH2PPh2)(2)] in ethanol affords the blue Co(II) complex [CoCl3{eta(1)-PPPh2CH2CH2N(CH2CH2CH3)(H)-(CH2CH2P(O)Ph-2)}] (1), which has been characterized by spectroscopic methods and X-ray diffraction analysis. The structure of 1 consists of a tetrahedral cobalt atom coordinated by three chlorides and by an eta(1)-P-PNP ligand bearing a dangling P=O end and quaternised at the nitrogen atom. EPR measurements and a detailed analysis of the magnetic behaviour of I are consistent with a tetrahedral Co(II) ion and accordingly support the protonation of the PNP nitrogen atom. A mechanistic picture accounting for the formation of 1 has been proposed from the isolation and characterization of three reaction intermediates along the pathway leading to 1 which involve either eta(2)-P,P- and eta(2)-P,N-PNP cobalt complexes.
2003
-
3233
3239
A. Romerosa; C. Saraiba-Bello; M. Serrano-Ruiz; A. Caneschi; V. McKee; M. Peruzzini; L. Sorace; F. Zanobini
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/344905
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