Synthesis and Characterization of Rhenium Thiolate Complexes. Crystal and Molecular Structures of [NBu4][ReO(H2O)Br4)]·2H2O, [Bu4N][ReOBr4(OPPh3)], [ReO(SC5H4N)3], [ReO(SC4H3N2)3][ReO(OH)(SC5H4N-3,6-(SiMe2But)2)2], [Re(N2COC6H5)(SC5H4N)Cl(PPh3)2], and [Re(PPh3)(SC4H3N2)3]