Mass spectra of organometallic compounds. 6. Energetics of fragmentations of manganese-containing ions with intact ligands in the series CH3C5H4Mn(CO)2L and CH3C5H4Mn(CO)(CS)L [L = Ph3As and Ph3Sb] [1]

✍ Scribed by Avi Efraty; D. Liebman; M.H.A. Huang; C.A. Weston

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 633 KB
• Volume: 39
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)93642-9

✦ Synopsis

The mass spectra of the related series CH,C,H,-M~I(CO)~L and CH,C,H,,Mn(CO)(CS)L (L = Ph& Ph&, and Ph$b) have been examined, and the appearance potentials of all manganese-containing ions with intact ligands determined. The primary fragmentation steps in the mass spectra of these series have been assigned and compared. A relative scale of manganese-to-ligand ionic bond dissociation energies has been established on the basis of the energetics of primary fragmentation steps and the relative currents of group ions. The relative bond strength of ligands in the fragment ions follows the order: CO < CS << L(= Ph& Ph3As, PhJb) < Cp. The relative bond strength of individual members of L follows the order; Ph$b < Ph3As < Ph3p. The conclusions reached in this study have been inferred from several independent sets of data, and this rules out coincidental agreements of results.