1J(199Hg199H g) values of up to 284 kHz in complexes of [Hg–Hg]2+ with crown ethers: the largest indirect coupling constants
Abstract
The values of the 1J(199Hg199Hg) coupling constant in solution of the asymmetric dimercury(2+) complexes with the stoichiometries Hg22+/18-crown-6 and Hg22+/18-crown-6/15-crown-5 are 220300 and 284100 Hz, respectively, representing the largest scalar couplings measured.