Second-order nonlinear optical properties of eight-membered centrosymmetric cyclic borasiloxanes

In an efficient 2+2 cyclocondensation reaction, electron-withdrawing arylboronic acids with diphenylsilanediol were converted to eight-membered cyclic borasiloxanes [(RPhBO)(PhSiO)] 2 [R = F ( 1 ), 2,4-F ( 2 ), CF 3 ( 3 ), CN ( 4 ), NO 2 ( 5 )]. All these compounds were characterized by elemental an...

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