UV irradiation of tetrahydrofuran solutions of [CpMn(CO)3] (Cp = π-C5H5 or π-C5H4Cl) in the presence of the phosphanes PPh3 or PCy3 (Cy = cyclohexyl) and Ph2PCH2CH2PPh2 yields the substitution products [CpMn(CO)2PR
3] (R = Ph or Cy) and [CpMn(CO)(Ph2PCH2CH2PPh2)], namely, dicarbonyl(η5-cyclopentadienyl)(triphenylphosphane-κP)manganese(I), [Mn(C5H5)(C18H15P)(CO)2], 1a, dicarbonyl(η5-1-chlorocyclopentadienyl)(triphenylphosphane-κP)manganese(I), [Mn(C5H4Cl)(C18H15P)(CO)2], 1b, dicarbonyl(η5-cyclopentadienyl)(tricyclohexylphosphane-κP)manganese(I), [Mn(C5H5)(C18H33P)(CO)2], 2a, dicarbonyl(η5-1-chlorocyclopentadienyl)(tricyclohexylphosphane-κP)manganese(I), [Mn(C5H4Cl)(C18H33P)(CO)2], 2b, carbonyl(η5-cyclopentadienyl)[1,2-bis(diphenylphosphanyl)ethane-κ2
P,P′]manganese(I), [Mn(C5H5)(C26H24P2)(CO)], 3a, and carbonyl(η5-1-chlorocyclopentadienyl)[1,2-bis(diphenylphosphanyl)ethane-κ2
P,P′]manganese(I), [Mn(C5H4Cl)(C26H24P2)(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.
在膦类化合物 PPh3 或 PCy3(Cy = 环己基)和 Ph2PCH2CH2PPh2 的存在下,用紫外线照射 [CpMn(CO)3](Cp = π-C5H5 或 π-C5H4Cl)的四氢呋喃溶液,可得到取代产物 [CpMn(CO)2PR
3](R = Ph 或 Cy)和[CpMn(CO)(Ph2PCH2CH2PPh2)],即二羰基(η5-环戊二烯基)(三苯基膦-κP)锰(I)、[1a,二羰基(η5-1-氯环戊二烯基)(三苯基膦-κP)锰(I),[Mn(C5H4Cl)(C18H15P)(CO)2],1b、二羰基(η5-环戊二烯基)(三环己基膦-κP)锰(I),[Mn(C5H5)(C18H33P)(CO)2],2a、二羰基(η5-1-氯环戊二烯基)(三环己基膦-κP)锰(I),[Mn(C5H4Cl)(C18H33P)(CO)2],2b,羰基(η5-环戊二烯基)[1,2-双(二苯基膦基)乙烷-κ2
P,P′]锰(I),[Mn(C5H5)(C26H24P2)(CO)],3a 和羰基(η5-1-氯环戊二烯基)[1,2-双(二苯基膦基)乙烷-κ2
晶体结构测定结果表明,氯取代对键长的影响很小,膦取代对键长的影响不大。PR
3 基团避免了与 C-Cl 键的啮合。所有化合物都利用微弱的 C-H...O 相互作用进行分子间结合,氯化产物中的 C-H...Cl 接触增强了这种作用。