Low Temperature Ft-Ir and Molecular Orbital Study of N,N-Dimethylglycine Methyl Ester: Proof for Different Ground Conformational States in Gas Phase and in Condensed Mediaelectronic Supplementary Information (Esi) Available: Calculated Geometries and Rotational Constants for the Most Stable Conformers of Dimethylglycine Methyl Ester. See Http://Www.rsc.org/Suppdata/Cp/B2/B209311C/