The dichlorogallyliron complexes Cp’(OC)₂FeGaCl₂ (Cp’ = Cp* (4a), Cp (4b), Cp*: η⁵-C₅Me₅, Cp: η⁵-C₅H₅), when treated with LiPPh₂ and/or Me₃SiPPh₂ in Et₂O, produce the four-membered Ga₂P₂ cyclic diiron complexes [Cp’(OC)₂FeGa(Cl)PPh₂]₂ (Cp’ = Cp* (5a), Cp (5b)) in 64% and 47% yields, respectively. Crystal structure analysis using X-ray crystallography revealed that the four-membered Ga₂P₂ cyclic structure in cis-5a is slightly puckered. The four-membered Ga₂P₂ cyclic structure remains undisturbed in a solution of complex 5a in C₆D₆ and C₇D₈. 5a exists as a mixture of the cis/trans geometric isomers in these solutions. The photochemical reaction with complex 5b in C₆D₆ produces a complex mixture. However, the photochemical reaction with complex 5a in C₆D₆ afforded the six-membered Fe-Ga-Fe-P-Ga-P cyclic diiron complex [{Cp*(OC)Fe}₂(μ-Ga)(μ-Ph₂PGaCl₂PPh₂)] (6a) in 61% yield (NMR yield). Crystal structure analysis revealed that complex 6a contains the Ga atom-bridged Fe-Ga-Fe fragment with two Fe−Ga multiple bonds.

所述dichlorogallyliron络合物CP '（OC）₂ FeGaCl ₂（CP'=的Cp *（图4a）中，Cp（图4b）中，Cp *：η ⁵ -C ₅我₅中，Cp：η ⁵ -C ₅ H ^ ₅），经处理的时与LiPPh ₂和/或Me ₃ SiPPh ₂在Et ₂ O中，生成四元Ga ₂ P ₂环状二铁配合物[Cp'（OC）₂ FeGa（Cl）PPh ₂ ] ₂（Cp'= Cp *（5a），Cp（5b））的收益率分别为64％和47％。使用X-射线晶体学晶体结构分析表明，该四元嘎₂ P ₂在环状结构的顺式-图5a略微起皱。四元Ga ₂ P ₂环状结构在C ₆ D ₆和C ₇ D _8中的络合物5a的溶液中保持不变。5a在这些溶液中以顺/反几何异构体的混合物形式存在。与络合物5b在C ₆ D _6中的光化学反应产生复杂的混合物。然而，与络合物5a在C ₆ D _6中的光化学反应提供了六元Fe-Ga-Fe-P-Ga-P环状二铁络合物[{Cp *（OC）Fe} ₂（μ-Ga）（μ- Ph ₂ PGaCl ₂ PPh ₂）]（6a）的产率为61％（NMR产率）。晶体结构分析表明，配合物6a包含带有两个Fe-Ga多个键的Ga原子桥接的Fe-Ga-Fe片段。