【摘要】 叠氮二异丁基铝DBAA是一个新合成的化合物。通过相对分子质量的测定、氢核磁共振谱和铝核磁共振谱的测定确定了DBAA三聚体的分子构造在溶液中研究了DBAA的三聚体和单量体之间的缔合解离平衡。这个平衡受溶剂性质、温度的影响。借助铝核磁共振谱和相对分子质量的测定计算了DBAA三聚体的解离平衡常数、解离焓和解离熵等热力学数据。更多还原

【Abstract】 The organoaluminum azide compounds are widely used.These compounds are azidating agents,and these are the materials from whic h the namometer AlN are prepared and a re also the energetic materials for which are always used i n national defense industry and in sp ace technology.The diisobutyl aluminum azide(DBAA)as an new compound have been prepared recently,and has not been reported in the literatu re yet.The molecular weight of DBAA a re determined with cryoscopic method.The1H NMR spectra are also determined at d ifferent temperatures.The molecular construction of(1),the trimmer of DBAA,is decided that is a hexatomic ring of Al and N according to the above-mentioned determinations.For the equilibrium o f association-diassociation(i.e.,trimmermonomer)of DBAA in benzene or toluene has been established by cryoscopic molecular-weight de-termination and1H NMR spectrum recorded at different temperatures:(DBAA)3 3DBAA The thermodynamic data(Kd,ΔHdandΔSd)of the(DBAA)3dissociation have been calculated f rom these observed values of27 Al NMR at different temperatures and molecular-weight determination.T hese data from different methods are consistent.更多还原