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The Gas-Phase Route from Cp_2P_6 to Neutral Hexaphosphorus

机译:从Cp_2P_6到中性六磷的气相路线

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Density functional theory has been applied to gain insight into the fragmentation and redox behavior of Cp_nP_6~(+/0) and Cp*_nP_6~(+/0) cations and neutral species (n = 1,2) in the gas phase. Particular attention is paid to the previously reported generation of neutral hexaphosphorus upon high-energy collisions of the CpP_6~+ cation. Theory provides an explanation for the experimentally observed effect that collisional electron transfer to the CpP_6~+ cation is negligible in that the associated Franck-Condon factors are predicted to be unfavorable. In contrast, dissociation of CpP_6~+ into Cp~++P_6 has a relatively low energy demand, thereby accounting for the efficient formation of neutral P_6 in the gas phase. Theoretical exploration of the parent compound Cp_2P_6 reveals that the unsubstituted cyclopentadienyl ligand is much less suitable in this respect, thereby sustaining the previous suggestion that Cp is a particularly good leaving group.
机译:密度泛函理论已被用于深入了解气相中Cp_nP_6〜(+ / 0)和Cp * _nP_6〜(+ / 0)阳离子和中性物质(n = 1,2)的碎片化和氧化还原行为。特别注意先前报道的在CpP_6〜+阳离子的高能碰撞下产生中性六磷的现象。理论为实验观察到的影响提供了解释,即碰撞电子转移到CpP_6〜+阳离子是微不足道的,因为相关的Franck-Condon因子被认为是不利的。相反,将CpP_6〜+解离为Cp〜++ P_6具有相对较低的能量需求,从而说明了气相中中性P_6的有效形成。对母体化合物Cp_2P_6的理论研究表明,未取代的环戊二烯基配体在这方面不太合适,从而维持了先前的建议,即Cp是一个特别好的离去基团。

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