Synthesis and thermal properties of some lithium β-diketonates

被引：11

作者：

Filatov, ES ^{[1
]}

Stabnikov, PA ^{[1
]}

Semyannikov, PP ^{[1
]}

Trubin, SV ^{[1
]}

Igumenov, IK ^{[1
]}

机构：

[1] Russian Acad Sci, Nikolaev Inst Inorgan chem, Siberian Div, Novosibirsk 630090, Russia

来源：

RUSSIAN JOURNAL OF COORDINATION CHEMISTRY | 2006年 / 32卷 / 02期

关键词：

Lithium; LiOH; Lithium Hydroxide; Electronic Absorption Spectroscopy; Knudsen Effusion;

D O I：

10.1134/S1070328406020084

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Five new volatile lithium complexes were synthesized by reactions of lithium hydroxide monohydrate (LiOH center dot H2O) with beta-diketones, namely, dipivaloylmethane (HDpm), hexafluoroacetylacetone (HHfa), trifluoroacetylactone (HTfa), benzoyltrifiuoroacetone (HBtfa), pivaloyltrifluoroacetone (HPta), and valeryltrifluoroacetone (HVta). The complexes obtained were studied by IR and electronic absorption spectroscopy, mass spectrometry, and comprehensive thermal analysis. The temperature dependence of the vapor pressure, which was obtained by the Knudsen effusion method with mass-spectrometric analysis of the vapor phase composition in the 400-450 K range, was used to calculate the standard thermodynamic parameters of the Li(Dpm) sublimation: Delta H(subl)degrees 45.7 +/- 1.7 kcal mol(-1) and Delta S(subl)degrees = 77.9 +/- 4.0 cal mol(-1) K-1.

引用

页码：126 / 129

页数：4

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