Pronounced electronic modulation of geometrically-regulated metalloenediyne cyclization.

For the suite of aryl-substituted ligands, differences in 31 P NMR chemical shift are small (<7 ppm); however, a clear trend is observed as a function of electron donating ability which is a mixture of both inductive ( σ ) and resonance (π) effects: 2e < 2c < 2a < 2b < 2d.

also in 19,460 other papers