| Abstract |
A new series of salts [RuCp(PP)(p-N dropC(CH=CH)(n)C6H4R)][X] (PP = ((+)-DIOP. DPPE: n = 0, 1: R = CH3,Br, OCH3, NH2, N(CH3)(2), C6H5 and NO2: X = PF6-, CF3SO3-) were synthesised and the second harmonic generation (SHG) efficiencies were measured by Kurtz powder technique in order to better understand the relationship between structural features and solid state packing with SHG properties. A structural study of [RuCp((+)-DIOP)(p-N drop CC6H4NO2)][X]. X = PF6. CF3SO3- by X-ray diffraction showed crystallisation on accentric groups. The PF, salt crystallised in a triclinic space group P1 showing perfect parallel alignment of the molecular dipoles. The CF3SO3 salt crystallised in a monoclinic space group P2(1) and shows an angle of 73.8 degrees between the molecular dipoles in the unit cell. Complex [RuCp(( +)-DIOP)(p-N drop CCH3)][PF6]. studied for comparison, crystallises in the C222(1) space group and shows eight molecules per unit cell randomly orientated. Comparison of the Ru-N and N dropC distances between the three compounds are in agreement with metal-nitrile bonding suggested by the spectroscopic data. (C) 2001 Elsevier Science B.V. All rights reserved. |
