Abstract: The isomeric 1, 2-, 1, 3-, 1, 4-, and 2, 3-bis (trimethylsilyl)-l, 3-butadienes have been synthesized, and their vertical ionization energies, characteristic vibrational frequencies,'H nmr signals, half-wave reduction potentials, radical-anion coupling constants, and electronic transitions have been determined. The different properties rela-tive to those of the corresponding alkyl derivatives are discussed in terms of inductive polarization+ ZsiRa ...