N,N'-Bis(2,6-diisopropylphenyl)formamidinate complexes of the heavy alkaline earths

Cole, Marcus LawfordJunk, Peter C.2007-02-252007-02-252005New Journal of Chemistry, 2005; 29:135-1401144-0546http://hdl.handle.net/2440/17821© Royal Society of Chemistry 2008The heavy alkaline earth elements calcium, strontium and barium react with two equivalents of N,N’-bis(2,6-diphenyl)formamidine (DippFormH) in the presence of bis(pentafluorophenyl)mercury to afford the bis(formamidinate) species [M(DippForm) ₂ (THF)n](M = Ca, n = 1 ( 1), M = Sr ( 2) or Ba ( 3), n = 2) in good to moderate yield. Use of one equivalent of DippFormH during the preparation of 1–3 putatively results in the formation of the organoamide heavy alkaline earth Grignard species “[(X)M(DippForm)]”(M = Ca, Sr or Ba, X = F or C₆F₅). These compounds participate in the nucleophilic substitution of the para-fluorine of pentafluorobenzene, a by-product of prior ligand exchange, to render DippForm(4-HC₆F₄).enN,N'-Bis(2,6-diisopropylphenyl)formamidinate complexes of the heavy alkaline earthsJournal article002005173110.1039/b411494a0002261649000172-s2.0-13244298979