Fast atom bombardment mass spectrometry of neutral methanide and ionic carbene platinum(II) derivatives

✍ Scribed by Giuseppe Cetini; Lorenza Operti; Gian Angelo Vaglio; Anna Laura Bandini; Guido Banditelli; Giovanni Minghetti

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 543 KB
• Volume: 24
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210240707

✦ Synopsis

The fast atom bombardment mass spectra of a series of neutral methanide and ionic carbene platinum(I1) complexes of formula dPePtL, and dPePt(LH),, (dPe = (C,H,),PCH,CH,P(C,H,),; L = -C(OCH,)=NCH, , -C(OCH,)=NC,H, , -C(OCH,)=NC,H,p-CH,), respectively are reported. Glycerol, 3-mercapto-1,2propanediol, bis(Z-hydroxyethyl)sulphide, Iaitrobenzyl alcohol, and 2,Qdi-tert-pentylphenol have been used as matrices. Neutral and ionic derivatives containing the same ligand behave similarly and give the same quasimolecular [dPePtL(L + H)]+ ion by different primary processes. Stepwise breakdown of the ligands L with retention or further loss of atoms or molecules of hydrogen is observed for all these complexes, followed by ejection of radicals from the dPe ligand. Elimination of CH,OH from [dPePtL(L + H)]+ also occurs. The highest ionic yields of both neutral methanide and ionic carbene complexes are observed in Imercapt*l,Zpropanediol, in bis(2hydroxyethyl)sulphide, and in 3-nitrobenzyl alcohol with respect to glycerol. The [dPePt(LH),I2+ doubly charged ions are present in the spectra obtained with 3-nitrobenzyl alcohol and are rather strong when L is -C(OCH,)=NCH, and -C(OCH,)=NC,H,p-CH,.

Substitution of ligands L with a molecule or with a fragment of a sulphur containing matrix takes place very seldom with this series of complexes.