Crystal and mol­ecular structures of some phosphane-substituted cymantrenes [(C(5)H(4) X)Mn(CO)LL′] (X = H or Cl, L = CO, L′ = PPh(3) or PCy(3), and LL’ = Ph(2)PCH(2)CH(2)PPh(2))

UV irradiation of tetra­hydro­furan solutions of [CpMn(CO)(3)] (Cp = π-C(5)H(5) or π-C(5)H(4)Cl) in the presence of the phosphanes PPh(3) or PCy(3) (Cy = cyclo­hex­yl) and Ph(2)PCH(2)CH(2)PPh(2) yields the substitution products [CpMn(CO)(2)PR (3)] (R = Ph or Cy) and [CpMn(CO)(Ph(2)PCH(2)CH(2)PPh(2))], namely, dicarbon­yl(η(5)-cyclo­penta­dien­yl)(tri­phenyl­phosphane-κP)manganese(I), [Mn(C(5)H(5))(C(18)H(15)P)(CO)(2)], 1a, dicarbon­yl(η(5)-1-chloro­cyclo­penta­dien­yl)(tri­phenyl­phosphane-κP)man­ganese(I), [Mn(C(5)H(4)Cl)(C(18)H(15)P)(CO)(2)], 1b, dicarbon­yl(η(5)-cyclo­penta­dien­yl)(tri­cyclo­hexyl­phosphane-κP)manganese(I), [Mn(C(5)H(5))(C(18)H(33)P)(CO)(2)], 2a, di­carbon­yl(η(5)-1-chloro­cyclo­penta­dien­yl)(tri­cyclo­hexyl­phosphane-κP)manganese(I), [Mn(C(5)H(4)Cl)(C(18)H(33)P)(CO)(2)], 2b, carbon­yl(η(5)-cyclo­penta­dien­yl)[1,2-bis­(di­phenyl­phosphan­yl)ethane-κ(2) P,P′]manganese(I), [Mn(C(5)H(5))(C(26)H(24)P(2))(CO)], 3a, and carbon­yl(η(5)-1-chloro­cyclo­penta­dien­yl)[1,2-bis­(di­phenyl­phosphan­yl)ethane-κ(2) P,P′]manganese(I), [Mn(C(5)H(4)Cl)(C(26)H(24)P(2))(CO)], 3b, The crystal structure determinations show a very small influence of the chlorine substitution and a moderate influence of the phosphane substitution on the bond lengths. The PR (3) groups avoid being eclipsed with the C—Cl bonds. All the com­pounds employ weak C—H⋯O inter­actions for inter­molecular association, which are enhanced by C—H⋯Cl contacts in the chlorinated products.