Cationic strontium hydride complexes supported by an NNNN-type macrocycle
Résumé
A trinuclear strontium hydride [(Me(4)TACD)(3)Sr-3(mu(2)-H)(4)(thf)][B(C6H3-3,5-Me-2)(4)](2) (Me(4)TACD = 1,4,7,10-tetramethyltetraazacyclododecane) and a mixed calcium strontium hydride [(Me(4)TACD)(2)CaSr(mu-H)(2)(thf)][B(C6H3-3,5-Me-2)(4)](2) were isolated by hydrogenolysis of cationic benzyl precursors. A solution of [(Me(4)TACD)(2)CaSr(mu-H)(2)(thf)][B(C6H3-3,5-Me-2)(4)](2) shows hydride ligand exchange between calcium and strontium centers and higher affinity of the hydride ligand toward calcium.