New aliphatic and aromatic thiolato-bridged complexes of palladium(II) and platinum(II)

摘要

The hydroxo binuclear complexes [NBu4](2)[{M(C6F5)(2)(mu-OH)}(2)] (M = Pd or Pt) react with thiols in methanol at room temperature to give the binuclear di-mu-thiolato complexes [NBu4](2)[{M(C6F5)(2)(mu-SR)}(2)] (M = Pd, R = Et 1, t-Bu 2, C6H5 3, and p-MeC6H4 4, M = Pt, R = Et 5, t-Bu 6, C6H5 7 or p-MeC6H4 8). The trinuclear palladium complexes [NBu4](2)[(C6F5)(2)Pd(mu-SEt)(2)Pd(mu-SEt)(2)Pd(C6F5)(2)] or [NBu4](2)[(C6F5)(2)Pd(mu-1,2- S2C6H4)Pd(mu-1,2-S2C6H4)Pd(C6F5)(2)] 10 have been obtained by reaction of the binuclear hydroxo palladium complex [NBu4](2)[{Pd(C6F5)(2)(mu-OH)}(2)] with an excess of EtSH in refluxing methanol or with an excess of C6H4(SH)(2)-1,2 in methanol at room temperature, respectively. The mixed hydroxo-azolate bridged complexes [{M(C6F5)(2)}(2)(mu-OH)(mu-L)](2-) [M = Pd, L = pyrazolate (pz); [M = Pt, L = pyrazolate (pz) or 3,5-dime thylpyrazolate (dmpz)] react with thiols (1:1 molar ratio) in methanol to give the corresponding mixed thiolato-azolate bridged palladium or platinum complexes [{M(C6F5)(2)}(2)(mu-SR)(mu-L)](2-) (M = Pd, L = dmpz, R = C6H5 11, p-MeC6H4 12; M = Pt, L = pz, R = C6H5 13, p-MeC6H4 14, Et 15, t-Bu 16; L = dmpz, R = C(6)H(5)17, R = p-MeC6H4 18; Et 19]. The complexes have been characterized by partial elemental analyses, conductance measurements and spectroscopic (IR and H-1 and F-19 NMR) methods. (C) 1998 Elsevier Science Ltd. All rights reserved. [References: 26]