The complexes trans-[Pb(18-crown-6)(NO3)2] (I), trans-[Pb(18-crown-6)(Hfa)2] (II), and [Pb2(18-crown-6)(Tfa)4] (III), where Hhfa is 1,1,1,5,5,5-hexafluoropentane-2,4-dione and Htfa is 1,1,1-trifluoropentane-2,4-dione, were synthesized and identified. The structures of crystals I–III were determined by X-ray diffraction, whereas the melting and decomposition of compounds II, III were studied by the differential scanning calorimetry. The temperature of preparative sublimation of complexes II, III was determined at 10−2 mm Hg. The semiempirical structural-thermochemical approach was used to analyze the parameters of complex II vaporization.
合成并鉴定了反式-[Pb(18-crown-6)(
NO3)2](I)、反式-[Pb(18-crown-6)(Hfa)2](II)和[Pb2(18-crown-6)(Tfa)4](III)复合物,其中 Hhfa 为 1,1,1,5,5,5 六
氟戊烷-2,4-二酮,Htfa 为 1,1,1 三
氟戊烷-2,4-二酮。晶体 I-III 的结构由 X 射线衍射法测定,而化合物 II、III 的熔化和分解则由差示扫描量热法研究。化合物 II、III 的制备升华温度是在 10-2 毫米
汞柱下测定的。采用半经验结构-热
化学方法分析了络合物 II 的汽化参数。