152941-20-3Relevant articles and documents
Carbocations with bent three-center, two-electron C-H-C bonds
McMurry, John E.,Lectka, Thomas
, p. 10167 - 10173 (2007/10/02)
We have synthesized a series of carbocations containing bent C-H-C bonds with progressively smaller bond angles (compounds 2, 4, 5, and 6). As the three-center bond is bent, the chemical shift of the central hydrogen moves strongly upfield while the chemical shift of the bridgehead carbons moves proportionately down field, indicating that an overall polarization of the bond is occurring. An essentially linear correlation exists between the estimated bond angle and the chemical shift, perhaps due to differences in the vibrational amplitudes of the C-H-C bond.
