Alkaline-earth metal complexes with pivaloylacetone

摘要

Pivaloylacetonates of alkaline-earth elements with composition M(Pa)_2·nH_2O n=1,M=Sr,Ca;n=0,2,M=Ba) were synthesized and studied by IR and thermal analysis;their solubilities and volatility were estimated.It was found that the volatility changes regularly in the series M(Acac)_2-M(Pa)_2-M(Thd)_2(HAcac is acetylacetone,HThd is dipivaloylmethane).The replacement of one methyl radical by the tert-butyl radical when going from acetylacetonates to pivaloylacetonates was shown to noticeably increase the volatility only for Sr(Pa)_2·H_2O.Complexes of barium pivaloylacetonate with tetraglyme ando-phenanthroline were synthesized and characterized.