Heterobimetallic diethanolaminate complexes of titanium and zirconium with alkaline earth metals

Ti(OPr i)4 or Zr(OPr i)4·Pr i OH react with hydrocarbon-insoluble complexes M{(OCH2CH2)NH(CH2CH2OH)}2 (M = Mg, Ca, Sr, Ba) in a 2:1 molar ratio to yield hydrocarbon-soluble heterobimetallic diethanolaminate isopropoxide complexes [M{(OCH2CH2)2NH}2{M(OPr i )3}2] (M = Mg, Ca, Sr, Ba; M = Ti, Zr), which have been characterized by elemental analyses, molecular weight measurements and spectroscopic [i.r., n.m.r. (1H and 13C)] studies