Electronics structures of amidine and its complex with platinum(IV). Orotonation of coordinated amidine

Autor: N. S. Panina, Yu. N. Kukushkin
Rok vydání: 1996
Předmět:
Zdroj: Journal of Structural Chemistry. 37:192-195
ISSN: 1573-8779
0022-4766
DOI: 10.1007/bf02591045
Popis: The electronic structures of amidine CH3C(NH)NH2 and its complex [Pt(NH3)5{CH3C(NH)NH2}]4+ are studied by the semiempirical CNDO method and by the ab initio Hartree-Fock-Roothaan method using the effective core potential for the platinum atom by the GAUSSIAN-92 program. It is shown that in free amidine the protonation of the NH group is energetically more profitable than the protonation of the NH2 group. Formation of the amidine-platinum(IV) ion complex is accompanied by a considerable redistribution of electron density in amidine atoms and bonds. In the above complex, the amidine NH2 group exhibits enhanced protophilic properties.
Databáze: OpenAIRE