三硫氰酸根三氨合镍(Ⅱ)银(Ⅰ)的晶体结构

Ni(NH_3)_3Ag(SCN)_3为蓝色块状晶体,属斜方晶系,空间群为Pbn2_1,晶胞参数 a=9.442(1),b=17.344(5), c=22.484(2),z=12, D_(ohs.)=2.15g.Cm~(-3),D_(calc.)=2.12g.cm~(-3)。在CAD4衍射仪上,采用MoKa射线,θ—2θ扫描方式,在2°<θ<22°范围内收集到2397个独立衍     

The vector fields admitting one-parameter spatial symmetry group and their reduction

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EXPERIMENTAL STUDY AND THEORETICAL INTERPR ETATION OF ELECTRONIC STRUCTURE OF CRYSTAL OF ETHYLENEDIAMINE COMPLEX OF NICKEL(Ⅱ)-SILVER(Ⅰ) THIOCYANATE

d-d electronic absorption spectrum of Ni(en)_3 [Ni (en)_2Ag_2(NCS)_6]·H_2O, ENST, was measured. Absorption bands are at 11,300, 13,150, 18,650, 23,000 and 28,700 cm~(-1). The electronic energy levels were calculated by means of ligand field theory. Its EPR spectrum was measured directly at 77 K without dilution with diamagnetic medium. Zero-field splitting and half-field transition were observed g=2.169±0.020, g= 2.164 ± 0.020 and |D|=0.095±0.003cm~(-1). This paper discusses synthetically and theoretically the experimental results of electronic structure and crystal structure of this complex crystal.