New pyrazolato derivatives of platinum(II) are isolated, (LL)Pt(pz)2, A, [LL = Ph2P(CH2)nPPh2 (n = 1, 2, 3, or 4), Ph2PCH2CH2AsPh2, (Ph2AsCH2)2 or cis-Ph2PCHCHPPh2; pzH = pyrazole, 3,5-dimethyl,- 3,5-bis(trifluoromethyl)-, or 3,5-dimethyl-4-nitro-pyrazole] by reaction of (LL)PtCl2 with pyrazole and potassium hydroxide in methanol. By protonation of A with fluoboric acid the corresponding pyrazole adducts, [(LL)Pt(pzH)2][BF4]2, B, are obtained when pzH is 3,5-dimethylpyrazole. The properties of the compounds are discussed on the basis mainly of the NMR evidence; 31P data are related to the dimension of the PtP(C)nP ring (n = 1-4) and to the trans-influence of the pyrazolato and pyrazole ligand. © 1982.
A series of pyrazole adducts and pyrazolato derivatives of platinum(II) containing various chelating phosphines as ligands: Characterization, 1H and 31P1H NMR spectra / G. Banditelli, A.L. Bandini, F. Bonati, G. Minghetti. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 60:C(1982), pp. 93-98. [10.1016/S0020-1693(00)91156-3]
A series of pyrazole adducts and pyrazolato derivatives of platinum(II) containing various chelating phosphines as ligands: Characterization, 1H and 31P1H NMR spectra
G. BanditelliPrimo
;A.L. BandiniSecondo
;
1982
Abstract
New pyrazolato derivatives of platinum(II) are isolated, (LL)Pt(pz)2, A, [LL = Ph2P(CH2)nPPh2 (n = 1, 2, 3, or 4), Ph2PCH2CH2AsPh2, (Ph2AsCH2)2 or cis-Ph2PCHCHPPh2; pzH = pyrazole, 3,5-dimethyl,- 3,5-bis(trifluoromethyl)-, or 3,5-dimethyl-4-nitro-pyrazole] by reaction of (LL)PtCl2 with pyrazole and potassium hydroxide in methanol. By protonation of A with fluoboric acid the corresponding pyrazole adducts, [(LL)Pt(pzH)2][BF4]2, B, are obtained when pzH is 3,5-dimethylpyrazole. The properties of the compounds are discussed on the basis mainly of the NMR evidence; 31P data are related to the dimension of the PtP(C)nP ring (n = 1-4) and to the trans-influence of the pyrazolato and pyrazole ligand. © 1982.
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