The formal two-electron reduction of the cyclo-tri(phosphonio)methanide dication 1²⁺ results in a ring-opening reaction via C–P bond cleavage to yield the unique phosphanyl-functionalized carbodiphosphorane 2. In situ spectroelectrochemical investigations of the reduction of dication 1²⁺ and the oxidation of 2 give insights into the mechanism of this unusual and reversible bond cleavage reaction. Compound 2 features in total three lone pairs of electrons, facilitating the preparation of mono-, di-, and trigold complexes.

中文翻译：

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环-三（膦）甲烷化物阳离子还原成膦酰基碳二膦烷的开环：原位紫外-可见光谱电化学和金配位

正式的双电子还原环三（膦酰基）甲烷化物1 ²⁺导致通过C–P键断裂的开环反应，从而产生独特的膦酰基官能化碳二膦酸酯2。对原位^离子1 ²⁺的还原和2的氧化的原位光谱电化学研究提供了对该异常且可逆的键裂解反应机理的见解。化合物2在总共三个孤对电子中具有特征，有助于制备单，双和三金复合物。