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本文报导了用新的合成路线合成的一系列硝酸合希土四丁基季铵盐的络合物。元素分析结果表明这类络合物可用[(C_4H_9)_4N]_xLn(NO_3)_y所表示,当Ln为La、Pr和Nd时,x=3,y=6;当Ln为Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu及Y时,x=2,y=5。 用四圆衍射仪测定了[(C_4H_9)_4N]_3Nd(NO_3)_6的晶体结构,用以代表轻希土的情况。[(C_4H_9)_4N]_3Nd(NO_3)_6属单斜晶系,空间群P2_(I/n),每一晶胞中有四个络合物分子。晶胞参数如下:a=16.896;b=23.059;c=17.443;β=90.58°,中心离子钕被来自六个硝酸根的十二个氧所配位。Nd-O键的平均长度为2.614。硝酸根排布在以Nd为中心的正八面体的六个顶角上,对位两两组成平面,它们之间的夹角接近90°。
This paper reports the synthesis of a series of complexes of tetrabutyl ammonium nitrate nitrate with a new synthetic route. The results of elemental analysis show that these complexes can be represented by [(C_4H_9) _4N] _xLn (NO_3) _y, x = 3 and y = 6 when Ln is La, Pr and Nd; , Tb, Dy, Ho, Er, Tm, Yb, Lu and Y, x = 2 and y = 5. The crystal structure of [(C_4H_9) _4N] _3Nd (NO_3) _6 was measured by a four-circle diffractometer to represent the light-earth condition. [(C_4H_9) _4N] _3Nd (NO_3) _6 is a monoclinic with space group P2_ (I / n), with four complex molecules in each unit cell. The unit cell parameters are as follows: a = 16.896; b = 23.059; c = 17.443; β = 90.58 °. The central ion neodymium is coordinated by twelve oxygen atoms from six nitrates. The average Nd-O bond length is 2.614. Nitrate is arranged on the six apexes of a regular octahedron centered at Nd, and the two aligned planes form a plane with an included angle of nearly 90 °.