H. Bock et al., TRIALKYLAMMONIUM-TRIALKYLAMINE-TETRAPHENYLBORATES [R(3)N(CIRCLE-PLUS)-H TER-DOT-CENTER-DOT-NR(3)][B-CIRCLE-MINUS(C6H5)(4)] WITH PROTOTYPE N-CIRCLE-PLUS-H-CENTER-DOT-CENTER-DOT-CENTER-DOT-N HYDROGEN BRIDGES, Tetrahedron letters, 35(40), 1994, pp. 7355-7358
Protonation of trialkylamines in the presence of the non-protonable an
ion tetraphenylborate allows to crystallize [R(3)N(+)-H... NR(3)] salt
s with trimethylamine, quinuclidine, diazabicyclooctane or pyridine. T
heir single crystal structures are rationalized by SCF and force-field
calculations.