- 作者: 秦忠平 ; 謝觀峻 ; 周捷麗 等
- 作者服務機構: 陸軍軍官學校理化系
- 中文摘要: The molecular structures of binuclear copper(II) complexes .lbrak.Cu/sub 2/REP(.mu.-OH)(ClO/sub 4/)/sub 2/.rbrak.(4) and .lbrak.Cu/sub 2/REP(.mu.-Cl)Cl/sub 2/.rbrak.(5), in which REP=deprotonated 2,6-bis(1'-(4'-(2"-pyridyl)-2'-thiabutyl))-4- methylphenol, have been characterized by single-crystal X-ray diffraction. The former crystallizes in the triclinic space group P.1bar. with a=10.156(3), b=12.631(3), c=25.128(10).ANG.,.alpha.=92.03(3), .beta.=96.84(3), .gamma.=108.02(2).degree., and Z=2. Complex 5 crystallizes in the monoclinic space group C2/c with a=12.166(2), b=11.825(2), c=18.240(4).ANG., .beta.=100.97(2).degree., and Z=4. All copper ions are pentacoordinated with ligation to a sulfur, a nitrogen, and the bridging phenolato oxygen of the REP ligand, the exogenous bridge, and a counteranion. The coordination geometry of each copper of the binuclear copper sites is square pyramidal in both 4 and 5. Magnetic susceptibility measurements in the temperature range 6-300K reveal a strong antiferromagnetic spin exchange in 5 (exchange integral 2J=-460cm/sup -1/). A diamagnetic behavior is observed for 4 according to a similar cryomagnetic investigation. The diamagnetism of 4 is further confirmed by measurements of magnetic susceptibility through Evan's method at room temperature. Complex 4 has no EPR signal. The powder EPR spectrum of 5 shows the typical triplet state characteristics with .DELTA.m=.plmin.1 transitions at g=2.15 and a weaker .DELTA.m=2 transition at half field with g=4.24.
- 英文摘要: --
- 中文關鍵字: Binuclear Copper(Ii) Complex; Magnetic Susceptibility; Molecular Structure; X-Ray Diffraction; Copper; Complex
- 英文關鍵字: 雙核銅錯合物;磁化率(感磁率);分子結構;X光繞射;銅;錯合物