Antiferromagnetic complexes with metal–metal bonds.: Part XXX. Synthesis and molecular structures of the antiferromagnetic adducts [Cp′Cr(μ-SPh)]2(μ3-Se).ML (Cp′=η5-CH3C5H4, ML=Fe3(μ3-S)2(CO)8, Mn2(CO)9, Mn2(CO)8), paramagnetic complexes Cp′Cr(μ-SPh)3Mn(CO)3 and [Cp′Cr(μ-SPh)]2Te, diamagnetic cluste