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Recent Developments in the Study of NMR Parameters

In certain cases, MM or semiempirical molecular orbital (e.g., MNDO) calculations are useful in predicting Ge chemical shifts. For instance, a variety of t-butylgermacy-clohexanes was prepared and their Ge (when possible) NMR spectra were determined.  [Pg.175]

In the case of 1-methyl-1-germacyclohexane derivatives, the Ge chemical shifts are very sensitive to the stereochemistry of a methyl group bonded to germanium. [Pg.175]

that of cis-112 (112ae) is ca. 12 ppm upheld when compared with that of trans-112 (112ee). Hence, it is possible to estimate the ratio of equatorial and Axial isomers of 109 based on its Ge chemical shifts (see Table 12). [Pg.175]

It will be interesting to see if 1-f-butylgermacyclohexanes are also sensitive to the stereochemistry of the f-butyl group and can be a means to distinguish whether [Pg.175]

Reproduced, with permission, from Takeuchi et al., Unresolved. [Pg.176]


See other pages where Recent Developments in the Study of NMR Parameters is mentioned: [Pg.155]    [Pg.175]   


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