Mass spectrometric studies of platinum(II) complexes of carbonyl-stabilized arsonium ylides

✍ Scribed by G. Facchin; L. Zanotto; R. Seraglia; P. Traldi

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 359 KB
• Volume: 27
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210271105

✦ Synopsis

A fast atom bombardment (FAB) mass spectrometric study was carried out on the two O-coordinated carbonylstabilized arsonium ylide Pt(I1) complexes {(dppe)PtCIIOC(R)C(H)AsPh, I}BF, ((dppe) = Ph,PCH,CH,PPh, ; R = CH, (l), OCH, (3)) and on the two corresponding C-coordinated isomers ((dppe)PtCIIPh,AsC(H)CORJ}BF, (R = CH, (2), OCH, (4)). The mass spectral analysis of complexes 1 and 2

reveals that it is possible to distinguish the two isomeric forms mainly on the basis of tbe relative abundance of the protonated triphenylarsine oxide at m/z 323 while the different coordination modes of the ylide in complexes 3 and 4 are evidenced by the different fragmentation pathways of these two derivatives. Furtber, the reaction between I(dppe)PtCI],(BF,), and the appropriate ylide performed under FAB conditions indicates that in both cases the first complex formed is the O-coordinated isomer, in agreement with that observed in the condensed phase.