Structural Comparisons of Silver(I) Complexes of Third-Generation Ligands Built from Tridentate (<i>o</i>-C<sub>6</sub>H<sub>4</sub>[CH<sub>2</sub>OCH<sub>2</sub>C(pz)<sub>3</sub>]<sub>2</sub>) versus Bidentate Poly(1-pyrazolyl)methane Units (<i>o</i>-C<sub>6</sub>H<sub>4</sub>[CH<sub>2</sub>OCH<sub>2</sub>CH(pz)<sub>2</sub>]<sub>2</sub>) (pz = Pyrazolyl Ring)
作者:Daniel L. Reger、Elizabeth A. Foley、Radu F. Semeniuc、Mark D. Smith
DOI:10.1021/ic7017743
日期:2007.12.1
The new bitopic, bis(1-pyrazolyl)methane-based ligand o-C6H4[CH2OCH2CH(pz)(2)](2) (L-2, pz = pyrazolyl ring) is prepared from the reaction of (pz)(2)CHCH2OH (obtained from the reduction of (pz)(2)CHCOOH with BH3 center dot S(CH3)(2)) with NaH, followed by the addition, of alpha,alpha'-dibromo-o-xylene. The reaction of L-2 with AgPF6 or AgO3SCF3 yields o-C6H4[CH2-OCH2CH(pz)(2)](2)(AgPF6)}(n) or o-C6H4[CH2OCH2CH(pz)(2)](2)(AgO3SCF3)}(n), respectively. Both compounds in the solid state have tetrahedral silver(l) centers arranged in a 1D coordination polymer network. The analogous ligand based on tris (1-pyrazolyl) methane units, o-C6H4[CH2OCH2C(pz)(3)](2) (L-3), reacts with AgO3SCF3 to form a similar coordination polymer, o-C6H4[CH2OCH2C(pz)(3)](2)(AgO3SCF3)}(n). In this case, each tris(pyrazolyl) methane unit in L-3 adopts the kappa(2)-kappa(0) bonding mode. trystallization of a 3:1 mixture of AgO3SCF3 and L-3 yields o-C6H4[CH2OCH2C(pz)(3)](2)(AgO3SCF3)(2)}(n), in which the tris(1-pyrazolyl) methane units adopt a kappa(2)-kappa(1) coordination mode.