A Monolithiated and Its Related 1,3-Dilithiated Benzylsilane: Syntheses and Crystal Structures

The monolithiated (aminomethyl)benzylsilane Me2Si[CHLi(C6H5)](CH2NC5H10) (3) and the corresponding 1,3-dilithiated compound Me2Si[CHLi(o-C6H4Li)](CH2NC5H10) (4) (CH2NC5H10 = piperidinomethyl), metalated at the benzyl position and at the ortho position of the phenyl ring, were obtained by successive deprotonation of Me2Si[CH2(C6H5)](CH2NC5H10) (1). Monolithiated 3, an internally coordinated cyclic tetramer, and 1,3-dilithiated 4, an internally coordinated cyclic hexamer, were structurally characterized by single-crystal X-ray diffraction methods.