Reaction of solid phenylmethanes with potassium

Organometallic Compounds of the Lanthanides. 179.1 Synthesis and Structural Characterization of a Mixed Alkyl (Benzhydryl, Trimethylsilylmethyl) Lutetium Complex

“…The 1 H NMR spectrum of 1 recorded in d 5 -pyridine corresponds with that recorded in d 8 -THF 2g. The large coupling constant 1 J ( 13 C, 1 H) = 146 Hz observed for the methine group in the 13 C NMR spectrum of 1 reflects the high degree of sp 2 -hybridization of this carbon atom.…”

“…Pyrophoric KCHPh 2 ( 1 ) can be prepared by several methods described in the literature. 2b,d,− We used the method of Schlosser 11 and obtained 1 by metalation of CH 2 Ph 2 with t BuOK and n BuLi in hexane as solvent-free, bright orange crystals in an almost quantitative yield …”

“…The benzhydryl anion, CHPh 2 - , showing a delocalized π-system, has been the subject of intense research activities. Its alkali metal derivatives were studied in detail by UV−vis absorption, NMR and ESR spectrometry, and molar conductivity measurements to determine the effects of the size of the cation and of the respective cation solvating solvent on the distribution of the π-electron density within the anion and on the thermodynamics of the equilibrium between contact ion pairs and solvent-separated ion pairs . The crystal structure of [Li(12-crown-4) 2 ][CHPh 2 ] reveals an almost trigonal-planar benzhydryl anion, which does not interact either with the lithium cation or with atoms of other molecules .…”