Here we report that attempted preparation of low-valent Ca-I complexes in the form of LCa-CaL (where L is a bulky beta-diketiminate ligand) under dinitrogen (N-2) atmosphere led to isolation of LCa(N-2)CaL, which was characterized crystallographically. The N-2(2-) anion in this complex reacted in most cases as a very potent two-electron donor. Therefore, LCa(N-2)CaL acts as a synthon for the low-valent Ca-I complex LCa-CaL, which was the target of our studies. The N-2(2-) anion could also be protonated to diazene ( N2H2) that disproportionated to hydrazine and N-2. The role of Ca d orbitals for N-2 activation is discussed.
机构:
Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China
Southwest Univ, Coll Chem & Chem Engn, Chongqing 400715, Peoples R ChinaBeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China
Ren, Wenshan
Lukens, Wayne W.
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Lawrence Berkeley Natl Lab, Actinide Chem Grp, Div Chem Sci, Berkeley, CA 94720 USABeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China
Lukens, Wayne W.
Zi, Guofu
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Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R ChinaBeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China
Zi, Guofu
Maron, Laurent
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Univ Toulouse, INSA, UPS, F-31077 Toulouse, France
LPCNO, CNRS, F-31077 Toulouse, FranceBeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China
Maron, Laurent
Walter, Marc D.
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Tech Univ Carolo Wilhelmina Braunschweig, Inst Anorgan & Analyt Chem, D-38106 Braunschweig, GermanyBeijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China