ISSN:
1573-9171
Keywords:
vacuum pyrolysis
;
matrix IR spectroscopy
;
semiempirical method AM1
;
1,1′-dimethyl-3,3′-spirobi(3-germa-6-oxabicyclo[3.1.0]hexane)
;
1,5-dimethyl-3,3′-spirobi(3-germa-6-oxabicyclo[3.1.0]hexane)
;
1,5-dimethyl-3,3′-spirobi(6-oxa-3-silabicyclo[3.1.0]hexane)
;
silicon dioxide
;
germanium dioxide
;
germanium monoxide
;
isopropenyl vinyl ether
;
divinyl ether
;
1,3-butadiene
;
2,3-dimethyl-1,3-butadiene
;
germanone
;
silanone
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Vacuum pyrolysis of 3-sila-3,3′-spirobi(6-oxabicyclo[3.1.0]hexanes) leads to the formation of monomeric silicon dioxide and 1,3-butadienes, whereas under the same conditions 3-germa-3,3′-spirobi(6-oxabicyclo[3.1.0]hexanes) afford germanium monoxide, the corresponding divinyl ethers, and 1,3-butadienes. A multistage mechanism of pyrolytic decomposition of the above spirobicyclohexanes was proposed on the basis of experimental data and calculations. The different behavior of the silicon and germanium compounds having similar structures can be explained by an increase in the bivalent state stability and by a decrease in the energy of the metal-oxygen double bond on the transition from silicon to germanium.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00703999
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