FAB mass spectrometry of palladium(II) derivatives with 1,4-benzodiazepin-2-ones: evidence of the stability of cyclometallated species

Cinellu, Maria Agostina and Minghetti, Giovanni and Banditelli, Guido and Bandini, Anna Laura and Pelli, Beatrice and Traldi, Pietro (1989) FAB mass spectrometry of palladium(II) derivatives with 1,4-benzodiazepin-2-ones: evidence of the stability of cyclometallated species. Inorganica Chimica Acta, Vol. 161 (1), p. 57-62. ISSN 0020-1693. Article.

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DOI: 10.1016/S0020-1693(00)90115-4

Abstract

The FAB spectra of the adducts trans-Pd(L)₂Cl₂ (1: L=DIAZEPAM, D=7-chloro-1,3-dihydro-1- methyl-5-phenyl-2H-1,4-benzodiazepin-2-one; 2: L= PRAZEPAM, P=7-chloro-1-(cyclopropylmethyl)-1,3- dihydro-5-phenyl-2H-1,4-benzodiazepin-2-one) and of the cyclometallated derivatives [Pd(L=H)Cl]₂ (L=D, 3; L=P, 4), Pd(Ph₃P)(L=H)X (L=P, X=Cl, 5; L=D, X=Br, 6), Pd(D)(D=H)Cl (7) have been studied in detail.
The main gas-phase fragmentation pathways of 1 and 2 consist in sequential HCl losses, while for compounds 3 and 4 only primary Cl• loss is observed. A peculiar behaviour is observed for 5 and 6, i.e. the lack of protonated molecular ions.

Item Type:	Article
ID Code:	4899
Status:	Published
Refereed:	Yes
Uncontrolled Keywords:	Palladium(II) derivatives, cyclometallated species, stability
Subjects:	Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:	001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:	Elsevier Science
ISSN:	0020-1693
Deposited On:	22 Nov 2010 11:11

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