硝酸铕与含氮冠醚(2,2)配合物的分子和晶体结构

• 作 者: 刘世昌 杨光弟 樊玉国 金钟声 金松春 朱天培
• 机 构: 内蒙古师范大学,吉林大学理论化学研究所,吉林大学理论化学研究所,中国科学院长春应用化学研究所,中国科学院长春应用化学研究所,中国科学院长春应用化学研究所
• 出 处: 应用化学
• 发表日期: 1986年01期
• 关键词: 冠醚 铕离子 单斜晶系 晶体结构 方块矩阵 四圆衍射仪 反射点 配位数 硝酸根 晶胞参数

硝酸铕与含氮冠醚(2,2)配合物晶体属单斜晶系,空间群为P2_1/n,晶胞参数为a=16.2745(81):b=11.5237(25),c=12.5658(60)A,β=112.180(34)°,Z=4.强度数据由四圆衍射仪收集到独立的可观察反射点数为2892条,采用MoK_a辐射。结构参数的修正采用方块矩阵最小二乘法,R=0.042.得出铕离子位于环的平均平面,两个硝酸根分别位于环的两侧。铕的配位数为10。铕离子与四个氧原子和二个氮原子以及二个双齿NO_3~-键合,构成配合物的阳离子部分,晶体的另一部分为阴离子NO_3~-。

The crystal of the complex of europium nitrate and nitrogen containing crown ether (2,2) is monoclinic with a space group of P2_1 / n with unit cell parameters of a = 16.2745 (81): b = 11.5237 (25) and c = 12.5658 60) A, β = 112.180 (34) °, Z = 4. The intensity data was collected by a four-circular diffractometer with 2892 independent observable reflection points, using MoK_a radiation. Structural parameters were corrected using the square matrix least-squares method, R = 0.042. It was found that the europium ions are located on the average plane of the ring and the two nitrates are located on either side of the ring. The coordination number of europium is 10. Europium ions combine with four oxygen atoms, two nitrogen atoms and two bidentate NO_3 ~ - to form the cationic part of the complex. The other part of the crystal is anion NO_3 ~ -.