Oxidative addition of diphenyl ditellurides to organometallic fragment [Mn(CO)(5)](-) produced cis-[Mn(CO)4(TePh)(2)](-). This complex crystallized in monoclinic space group P2(1)/n with a = 12.876(6) Angstrom, b = 18.001(7) Angstrom, c = 18.670(7) Angstrom, beta = 93.77(3)degrees, V= 4318(3) Angstrom(3), Z = 4, final R = 0.035, and R(w) = 0.034. Thermolytic conversion of cis-[Mn(CO)(4)(TePh)(2)](-) to [(CO)(3)Mn(mu-TePh)(3)Mn(CO)(3)](-) was accomplished in high yield by refluxing [Mn(CO)(4)(TePh)(2)](-) in THF solution. Crystal data : triclinic space group P (1) over bar, a = 10.820(2) Angstrom, b = 15.038(4) Angstrom, c = 19.697(7) Angstrom, alpha = 107.67(3)degrees beta = 96.23(3)degrees, gamma = 107.63(2)degrees, V =2838(1) Angstrom(3), Z = 2, R = 0.025, and R(w) = 0.026. Oxidation of Co2+ by diphenyl ditelluride in the presence of "chelating metalloligand" cis-[Mn(CO)(4)(TePh)(2)](-), followed by carbonyl shift from Mn to Co and a benzenetellurolate group rearranging to bridge two metals, led directly to (CO)(3)Mn(mu-TePh)(3)Co(CO)(mu-TePh)(2)Mn(CO)(4). Crystal data : triclinic space group P (1) over bar, a = 11.689(4) Angstrom, b = 12.509(5) Angstrom, c = 15.930(9) Angstrom, alpha = 82.85(5)degrees, beta = 74.87(5)degrees, gamma = 70.56(4)degrees, V = 2119(2) Angstrom 3, Z = 2, R = 0.074, and R(w) = 0.091. Addition of [Ph(3)C][BF4] to [(CO)(3)Mn(mu-TePh)3Mn(CO)(3)](-) resulted in formation of the well-known (CO)(4)Mn(mu-TePh)(2)Mn(CO)(4) dimer. This complex crystallized in the monoclinic space group P2(1)/n with a = 18.852(4) Angstrom, b = 7.094(4) Angstrom, c 18.604(6) Angstrom, beta = 106.29(2)degrees, V = 2388(2) Angstrom(3), Z = 4, final R = 0.048, and R(w) = 0.047.