TY - JOUR
T1 - Synthesis of the first anionic derivatives of Hf(CO)7
T2 - [(C5h5)Hf(CO)4]- and [(C5Me5)Hf(CO)4]-
AU - Frerichs, Scott R.
AU - Ellis, John E.
PY - 1989/1/10
Y1 - 1989/1/10
N2 - Potassium naphthalenide reductions of [(C5R5)HfCl3] (R H, Me) in 1,2-dimethoxyethane at -60°C followed by carbonylation at atmospheric pressure provide 25-50% isolated yields of the first examples of carbonyl anions of hafnium(0), [(C5H5)Hf(Co)4]- and [(C5Me5)Hf(CO)4]-. These were isolated as tetraethylammonium salts as well as K(cryptand-2.2.2) and K(15-Crown-5)2+ salts for the latter anion and now represent two of only four presently known Hf0 carbonyls. They were characterized by elemental analyses, IR and 1H and 13C NMR spectra.
AB - Potassium naphthalenide reductions of [(C5R5)HfCl3] (R H, Me) in 1,2-dimethoxyethane at -60°C followed by carbonylation at atmospheric pressure provide 25-50% isolated yields of the first examples of carbonyl anions of hafnium(0), [(C5H5)Hf(Co)4]- and [(C5Me5)Hf(CO)4]-. These were isolated as tetraethylammonium salts as well as K(cryptand-2.2.2) and K(15-Crown-5)2+ salts for the latter anion and now represent two of only four presently known Hf0 carbonyls. They were characterized by elemental analyses, IR and 1H and 13C NMR spectra.
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U2 - 10.1016/0022-328X(89)85439-7
DO - 10.1016/0022-328X(89)85439-7
M3 - Article
AN - SCOPUS:26144453843
VL - 359
SP - C41-C44
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
SN - 0022-328X
IS - 2
ER -