New aspects of the reaction between tBuNCHCHNtBu and Fe2(CO)9, solving the controversy about the coordination mode of the DAB ligand in Fe(CO)3 (tBuNCHCHNtBu) (DAB = 1,4-diazabutadiene)

Autor:	Kees Vrieze, L.H. Polm, L.H. Staal
Rok vydání:	1980
Předmět:	Inorganic Chemistry Reaction mechanism Crystallography Chemistry Ligand Materials Chemistry Physical and Theoretical Chemistry Catalysis
Zdroj:	Inorganica Chimica Acta. 40:165-170
ISSN:	0020-1693
DOI:	10.1016/s0020-1693(00)91998-4
Popis:	Fe2(CO)9 and tBuNCHCHNtBu react to form Fe(CO)3(tBuNCHCHNtBu), tBuNCHCHN(tBu)CO and Fe(CO)5 in equimolar amounts. The Fe(CO)3(tBuCHCHNtBu) complex contains the DAB (1,4-diazabutadiene) ligand in the σ,σ-coordination mode, which is in contradiction with the earlier assumption that the DAB ligand is σ, π-coordinated. tBuNCHCHN(tBu)CO can be prepared by reacting DAB with CO in a pressure vessel, using Fe2(CO)9 as a catalyst. Only three catalytic cycles could be obtained using CO pressures ranging from 2.5 to 60 atm. A possible reaction mechanism is discussed.
Databáze:	OpenAIRE
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