Issue 10, 1992

New methoxo-, hydroxo- and pyrazolate-bridged platinum(II) complexes. Crystal structure of [NBu4]2[{Pt(C6F5)2}2(µ-OH)(µ-dmpz)](dmpz = 3,5-dimethylpyrazolate)

Abstract

The hydroxo complex [{Pt(C6F5)2(µ-OH)}2]2– reacts with azoles (1 : 1 molar ratio) in benzene to give the double bridged complexes [{Pt(C6F5)2}2(µ-OH)(µ-L–L)]2–[L–L = pyrazolate (pz)1, 3,5-dimethyl-pyrazolate (dmpz)2, 3-methylpyrazolate (mpz)3 or indazolate(indz)4]. When the same reaction is carried out in methanol with the reactants in 1 : 2 molar ratio the corresponding di-µ-azolate derivatives [{Pt(C6F5)2(µ-L–L)}2]2–[L–L = pz 5, dmpz 6, mpz 7 or indz 8] are obtained. On treatment of [{Pt(C6F5)2(µ-OH)}2]2– with methanol the di-µ-methoxo complex [{Pt(C6F5)2(µ-OMe)}2]2–9 was obtained. The di-µ-azolate complexes 58 can be alternatively prepared by treatment of 9 with the respective azoles (1 : 2 molar ratio) in methanol. Reaction of complex 1 with methanol leads to the formation of [{Pt(C6F5)2}2(µ-OMe)(µ-pz)]2–10. All the complexes have been isolated as the [NBu4]+ salts. Spectroscopic (IR, 1H and 19F NMR) data have been used for structural assignments, and an X-ray structure determination carried out for [NBu4]2[{Pt(C6F5)2}2(µ-OH)(µ-dmpz)] has established the binuclear nature of the anion. The structure was solved and refined to R= 0.057 and R′= 0.089 based on 10 057 observed reflections. The Pt atoms are four-co-ordinated, Pt(1)–O 2.113(7), Pt(1)–N(1) 2.04(1), Pt(1)–C(10) 2.02(1), Pt(1)–C(20) 1.96(2), Pt(2)–O 2.077(9), Pt(2)–N(2) 2.075(9), Pt(2)–C(30) 1.97(2), Pt(2)–C(40) 2.00(1)Å, and show deviations from a square-planar arrangement towards a tetrahedral disposition.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1992, 1681-1686

New methoxo-, hydroxo- and pyrazolate-bridged platinum(II) complexes. Crystal structure of [NBu4]2[{Pt(C6F5)2}2(µ-OH)(µ-dmpz)](dmpz = 3,5-dimethylpyrazolate)

G. López, J. Ruiz, G. García, C. Vicente, V. Rodríguez, G. Sánchez, J. A. Hermoso and M. Martínez-Ripoll, J. Chem. Soc., Dalton Trans., 1992, 1681 DOI: 10.1039/DT9920001681

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements