The molecular structure and conformational composition of (silylmethyl) cyclopropane (SMCP), C3H5 CH2 SiH3, with respect to the Cring CH2 and the CH2 Si axes have been studied by gas-phase electron diffraction and ab initio calculations using a 6-31G∗ basis set. The conformational analysis, with respect to the Cring C bond, has shown that the gauche (skew) form is the predominant conformation (> 98%) in the gas phase. A ...