94234-98-7

Upstream product

• 111975-70-3 <1,2-13C>-1,1,3,3-tetraphenylacetone 
• 96165-51-4 <13C2>-diphenylacetic acid 
• 94234-97-6 1,1,3,3-tetraphenylacetone dianion lithium salt 
• 7476-11-1 1,1,3,3-tetraphenylpropane-2-one 
• 94234-97-6 C₂₇H₂₂O^(2-)*2Li⁽¹⁺⁾ 

Relevant academic research and scientific papers

Y-Conjugated Dianions. A 13C Nuclear Magnetic Resonance Study

Tris(diphenylmethylene)methane dianion (12-), tetraphenylacetone dianion (22-), and diphenylacetate dianion (32-) were generated in dimethyl sulfoxide or tetrahydrofuran solutions by deprotonation of the appropriate carbon acid.Chemical shifts, carbon-carbon spin coupling constants, and other spectroscopic evidence indicated an sp2-hybridized central atom for all dianions, as well as D3 symmetry for the all-carbon dianion.The one-bond CC spin coupling constant for 12- (62 Hz) increased upon consecutive replacements of diphenylmethylene by the groups, i.e., to 69 Hz for 22- and 76.7 Hz for 32-,2K+ (86.0 Hz for the Li+ salt) reflecting charge localization at oxygen.An empirical model for the residual charge on phenyl-substituted resonance-stabilized carbanions that allows comparison of dissimilarly substituted carbanions was developed.