Pt(BF4)(N:NAr)(PPh3)2 (Ar = C6H5, p-FC6H4) can be hydrogenated in a variety of solvents under mild conditions using no addnl. catalyst. In ethanol the hydrazine complex [PtH(H2NNHAr)(PPh3)2][BF4] is formed, while in the presence of acetone the corresponding hydrazone complex results. The ready availability of a coordination site on the Pt(N:NAr)(PPh3)2 unit must play a key role in the easy activation of mol. H which leads to these hydrazine derivs. The crystal structure of trans-[PtH(PhHNNC3H6)(PPh3)2][BF4]•C6H6 was detd. The coordination geometry about the Pt atom is square planar with trans phosphine groups. The hydrazone group is bound to the Pt atom through the sp2- hydridized N atom.
Hydrogenation of aryldiazenido complexes. Synthesis and structure of trans-hydrido(acetonephenylhydrazone)bis(triphenylphosphine)platinum(II) tetrafluoroborate
TONIOLO, Luigi;
1977-01-01
Abstract
Pt(BF4)(N:NAr)(PPh3)2 (Ar = C6H5, p-FC6H4) can be hydrogenated in a variety of solvents under mild conditions using no addnl. catalyst. In ethanol the hydrazine complex [PtH(H2NNHAr)(PPh3)2][BF4] is formed, while in the presence of acetone the corresponding hydrazone complex results. The ready availability of a coordination site on the Pt(N:NAr)(PPh3)2 unit must play a key role in the easy activation of mol. H which leads to these hydrazine derivs. The crystal structure of trans-[PtH(PhHNNC3H6)(PPh3)2][BF4]•C6H6 was detd. The coordination geometry about the Pt atom is square planar with trans phosphine groups. The hydrazone group is bound to the Pt atom through the sp2- hydridized N atom.
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