Isomer Dependence in the Assembly and Lability of Silver(I) Trifluoromethanesulfonate Complexes of the Heteroditopic Ligands, 2-, 3-, and 4-[Di(1<i>H</i>-pyrazolyl)methyl]phenyl(di-<i>p</i>-tolyl)phosphine
作者:James R. Gardinier、Jeewantha S. Hewage、Sergey V. Lindeman
DOI:10.1021/ic5019357
日期:2014.11.17
and its solid-state and solution spectroscopic properties were studied for comparison purposes. These studies suggest that the cyclic structures of 1 and 2 are likely preserved but are dynamic in solution at room temperature. Moreover, both 3 and 4 have dynamic solution structures where 3 is likely extensively dissociated in CH3CN or acetone rather than being polymeric as in the solid state.
一个新的异位配体的三个异构体,其包含通过对-,间-或邻-亚苯基间隔基(pL与二(对甲苯基)膦基连接的二(1 H-吡唑基)甲基(-CHpz 2)部分,分别为mL和oL)已通过使用HP(p- tolyl)2与(IC 6 H 4)CHpz 2的适当异构体之间的钯(0)催化偶联反应合成。制备了1:1的三氟甲磺酸银(Ag(OTf))配合物,以检查配体配位的性质以及所获得的超分子异构体(单体,环状低聚或聚合)的类型。单晶X射线衍射研究表明,[Ag(pL)](OTf)1和[Ag(mL)](OTf)2 2具有环状二聚体指示,而[Ag(oL)](OTf) ,3,是配位聚合物。与3苯基膦反应可破坏3中的聚合物链,生成的络合物[Ag(oL)(PPh 3)](OTf),4,具有其中配体结合于银在螯合一个单金属阳离子κ 2 P,N -配位模式。的解决方案的结构1 - 4经由IR的组合探查,变温多核(1个H,13 C,31