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合成了三种标题化合物LnC_8H_(16)N_3O_(13)(In=Pr,Nd,Sm)。并用单晶X射线衍射法测定了它们的晶体与分子结构。它们均属单斜晶系,空间群为P2_1/c,Z=4。晶胞参数为:a=12.160(4)[12.153(4),12.122(4)]。b=8.549(3)[8.562(2),8.550(4)],c=15.435(2)[15.376(3),15.293(6)]A,β=92.55(2)[92.22(2),91.77(3))°,结构用Patterson函数法与Fourier迭代法解出,并用最小二乘法修正,最后的R值为0.032[0.067,0.068]。Ln~(3+)离子跟三个双齿配位体的硝酸根及冠醚环上的四个氧原子键合,形成十配位的化合物。Ln-O的距离在2.49～2.62[2.47～2.62,2.44～2.58]A范围之内,平均值为2.54[2.53,2.51]A。
Three title compounds LnC_8H_ (16) N_3O_ (13) (In = Pr, Nd, Sm) were synthesized. Their crystal and molecular structures were determined by single crystal X-ray diffraction. They are all monoclinic with space group P2_1 / c and Z = 4. The unit cell parameters are: a = 12.160 (4) [12.153 (4), 12.122 (4)]. b = 8.549 (3) [8.562 (2), 8.550 (4)], c = 15.435 (2) [15.376 (3), 15.293 (6)] A, β = 92.55 (2) [92.22 (2), 91.77 (3)) °, the structure is solved by the Patterson function method and the Fourier iteration method, and corrected by the least squares method. The final R value is 0.032 [0.067,0.068]. The Ln ~ (3+) ions bond with the four oxygen atoms of the three bidentate nitrates and the crown ether rings to form a 10-coordinated compound. Ln-O ranged from 2.49 to 2.62 [2.47 to 2.62 and 2.44 to 2.58] A, with an average of 2.54 [2.53 and 2.51] A.