摘要
近年来,希土冠醚配合物的研究受到广泛重视,但希土氯化物冠醚配合物的报道甚少。A.Seminara等报道过NdB15C5Cl_3·2H_2O与EuBl5C5Cl_3·4H_2O两种配合物,其他希土氯化物与冠醚B15C5之间形成的配合物未见报道。我们用半微量相干衡方法,研究LaCl_3·3H_2O-B15C5-C_2H_5OH三元体系在25℃时的溶解度,为合成固态配合物提供依据。在制得配合物的基础上,利用化学分析、IR、DTG、TG、DSC、电导及X-射线分析研究了配合物的组成与性质。
The solubilities of the ternary system, LaCl3·3H2O-B15C5-C2H5OH, at 25℃ have been investigated by the semimicro method of phase equilibrium study. The refractive indexes of saturated solutions have been determined. The results indicated that there are two coordination compound formed in this system at 25℃ . The composition of the two coordination compound arc: LaCl3· B15C5 · 3H2O· 1.5C2H5OH and 2LaCl3· B15C5· 6H2O ·1.5C2H5OH.
The two solid coordination compound have been prepared. Samples of these coordination compounds were dried in a dcssicator over 80% H2SO4 and in one over P2O5 until constant weight were attained. The chemical analytical results show that the dried samples have the compositions: LaCl3 ·B15C5·?3H2O, 2LaCl3·?B15C5·?6H2O(80% H2SO4) and LaCl B15C5, 2LaCl3-B15C5(P2O5).
The compositions and properties of the coordination compounds (LaCl3 ·B15C5·?3H2O and 2LaCl3·?B15C5 ·6H2O) have been also investigated by IR, DTG, TG, DSC, X-ray diffraction analysis and conductivity measurements. The enthalpies of some processes during decomposition have been determined for these two coordination compounds by DSC.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1992年第2期209-212,共4页
Chinese Journal of Inorganic Chemistry
关键词
三水氯化镧
相平衡
冠醚配合物
trihydrated lanthanum chloride phase equilibrium coordination compound crown ether B15C5
