
TY  - JOUR
A1  - Wege, D 
A1  - Wilkinson, SP 
T1  - On the stability of Benzonorbornadienone and Tricarbonyl(benzonorbornadienone) chromium
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1973
VL  - 26
IS  - 8
SP  - 1751
EP  - 1762
KW  - 
UR  - https://doi.org/10.1071/CH9731751 
N2  - Benzonorbornadienone could not be isolated at 0°, nor detected at -45° in the hydrolysis of 7,7-dimethoxybenzonorbornadiene (9,9-dimethoxy- 1,4-dihydro-1,4-methanonaphthalene) (5). Reaction of (5) with chromium hexacarbonyl gave endo-tricarbonyl(7,7- dimethoxybenzonorbornadiene)chromium (14) (1 %) and a new type of alkene-ether complex of composition (7,7- dimethoxybenzonorbornadiene)-Cr(CO)4 (36%). Hydrolysis of (14) gave-only tetracarbonyl(naphthal-ene)chromium (24), and naphthalene. Oxidation of exo- and endo- tricarbonyl(anti-7-benzonorbornadienol)chromium with silver carbonate on Celite at 40° gave mainly tricarbonyl(1-naphthaldehyde)chromium, accompanied by a small amount of (24). It is concluded that benzonorbornadienone and tricarbonyl(benzonorbornadienone)chromium are unstable at -45°, and 40°, respectively. The factors contributing to the instability of these ketones are briefly discussed. 
ER  -

