A Structural study on uranyl (VI) nitrate complexes with cyclic amides; -butyl-2-pyrrolidone, -cyclohexylmethyl-2-pyrrolidone, and 1,3-dimethyl-2-imidazolidone

-ノルマルブチル-2-ピロリドン,-シクロヘキシル-2-ピロリドン及び1,3-ジメチル-2-イミダゾリドンの環状アミドによる硝酸ウラニル錯体構造の研究

古志野 伸能*; 原田 雅幸*; 野上 雅伸*; 森田 泰治  ; 菊池 俊明*; 池田 泰久*

Koshino, Nobuyoshi*; Harada, Masayuki*; Nogami, Masanobu*; Morita, Yasuji; Kikuchi, Toshiaki*; Ikeda, Yasuhisa*

UO(NO)L[L=-ノルマルブチル-2-ピロリドン,-シクロヘキシル-2-ピロリドン及び1,3-ジメチル-2-イミダゾリドン]の構造をX線回折により解析した。これらの錯体は2の六角錘を合わせた構造であることがわかり、U=O結合及びU-O(配位子)結合の距離、及びU-O-C(カルボニル基)の角度を求めることができた。また、赤外及びラマンスペクトルの測定から錯体の振動周波数を求めた。配位子の配位数とO=U=O結合の振動周波数との関係から、各配位子の配位性を求めた。

Structural analyses of UO(NO)L [L=-butyl-2-pyrrolidone, N-cyclohexylmethyl-2-pyrrolidone, and 1,3-dimethyl-2-imidazolidone] have been carried out using X-ray diffraction method. These uranyl complexes were found to have a hexagonal bipyramidal structure. The bond distances of U=O and U-O (ligand), and bond angles of U-O-C(carbonyl) are determined. In uranyl nitrate complexes with cyclic amides such as 2-pyrrolidone, urea, and caprolactam derivatives, a linear correlation was found to hold between U-O (ligand) bond distances and U-O-C(carbonyl) bond angles. Vibrational frequencies of UO(NO)L have also been measured by IR and Raman spectrophotometers. Using relationships between vibrational frequencies of O=U=O bonds and donor numbers (DNs) of ligands, donicities of N-substituted-2-pyrrolidones were determined.