Weakly Coordinating Anions: Crystallographic and NQR Studies of Halogen−Metal Bonding in Silver, Thallium, Sodium, and Potassium Halomethanesulfonates
作者:Gary Wulfsberg、Katherine D. Parks、Richard Rutherford、Debra Jones Jackson、Frank E. Jones、Dana Derrick、William Ilsley、Steven H. Strauss、Susie M. Miller、Oren P. Anderson、T. A. Babushkina、S. I. Gushchin、E. A. Kravchenko、V. G. Morgunov
DOI:10.1021/ic010715i
日期:2002.4.1
925(2) A; orthorhombic; space group Pnma; Z = 4) and compared it with the known structure of Ag(O(3)SCH(2)Br) (Charbonnier, F.; Faure, R.; Loiseleur, H. Acta Crystallogr., Sect. B 1978, 34, 3598-3601). The halogen atom in each is apical (three-coordinate), being weakly coordinated to two silver ions. (127)I NQR studies on Ag(O(3)SCH(2)I) show the expected NQR consequences of three-coordination of iodine:
35Cl,(79,81)Br和(127)I NQR(核四极共振)光谱结合X射线晶体学分析可能是表征金属阳离子(如Ag(+))与卤素的二次键合的最佳方法之一配位非常弱的阴离子表面上的供体原子。我们确定了Ag(O(3)SCH(2)Cl)的X射线晶体结构(a = 13.241(3)A; b = 7.544(2)A; c = 4.925(2)A;正交;空间Pnma组; Z = 4)并将其与Ag(O(3)SCH(2)Br)的已知结构进行比较(Charbonnier,F .; Faure,R .; Loiseleur,H.Acta Crystallogr。,Sect.B 1978) ,34,3598-3601)。每一个中的卤素原子都是顶端(三配位),与两个银离子的配位较弱。(127)I对Ag(O(3)SCH(2)I)的NQR研究显示了碘三配位的预期NQR后果:大大降低了NQR频率nu(1)和nu(2)