Deprotonation of 1,1′-methylenebis[4-tert-butyl-2-(diphenylphosphino)-benzene] and its analogues: synthesis and crystal structure of {5-But-2-[4-But-2-(Ph2P)C6H3(Ph)CH]C6H3P(Ph)K(OEt2)}2

Sc and Y Heteroalkyl Complexes with a NCsp3N Pincer‐Type Diphenylmethanido Ligand: Synthesis, Structure, and Reactivity

“…It was found that 1 does not react with n BuLi, however can be readily deprotonated by Lochmann‐Schlosser super base n BuLi/ t BuOK affording the potassium diphenylmethanide [{[4‐ t Bu‐2‐(C 3 H 2 N 2 Me‐1)C 6 H 3 ] 2 CH}K(OEt 2 )] 2 ( 2 K , Scheme ). Similarly the phosphino substituted diphenyl methane [4‐ t Bu‐2‐(PPh 2 )C 6 H 3 ] 2 CH 2 also was inert toward alkyllithium reagents but metalation was successful when n BuLi/ t BuOK mixture was used . On the contrary the NMe 2 substituted analogue 2,2'‐(4‐MeC 6 H 3 NMe 2 ) 2 CH 2 readily reacts with both n BuLi and Lochmann‐Schlosser super bases ( n BuLi/ t BuOM, M = Na, K) …”