A variety of correlated molecular orbital methods and basis sets have been employed to obtain the minimum-energy geometries, harmonic vibrational frequencies, and relative energies of the (X) over tilde(1)A(1), (a) over tilde(3)B(1), and (A) over tilde(1)B(1) states of SiCl2. The ab initio results obtained have been compared with experimental values, where available. It was found that ab initio methods which are based on unrestricted-spin (UHF) wave functions employing spin-unprojected energies. including the QCISD(T) and CCSD(T) methods and the composite methods of G1 and G2, failed to give a reliable (A) over tilde(1)B(1)-(X) over tilde(1)A(1) separation, whereas methods using spin-projected energies or the restricted multireference method MR-CISD/6-3-11G (2df) gave reliable (A) over tilde-(X) over tilde and B-X separations. The (A) over tilde(1)B(1)-(X) over tilde(1)(A) over tilde(1) and (a) over tilde(3)B(1)-(X) over tilde(1)A(1) emission spectra of SiCl2 were simulated, employing MP2/6-311G (2df) force constants and compared with available experimental spectra. The geometry of the (X) over tilde state was held fixed at the geometry determined by microwave spectroscopy, and the geometries of the (a) over tilde(3)B(1) and (A) over tilde(1)B(1) states were adjusted via an iterative Franck-Condon analysis (IFCA) procedure until the simulated spectra matched best with the observed spectra. The IFCA derived geometry for the (A) over tilde(1)B(1) state is r(SiCl) = 2.055 +/- 0.008 Angstrom and theta(ClSiCl) = 119.4 degrees +/- 0.4 degrees. For the (a) over tilde(3)B(1) state, r(SiCl) = 2.041 +/- 0.005 Angstrom, while the (ClSiCl) angle can have a value of either 115.4 degrees or 114.5 degrees, depending on the vibrational assignments of the experimental spectra.