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Structure and bonding of IrB12?: converting a rigid boron B12 platelet to a Wankel motor

机译:IRB12的结构和粘合?:将刚性硼B12血小板转换为Wankel电机

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The global minimum of IrB _(12) ~(?) is a C _(3v) symmetric bowl-like structure in which the Ir atom is located on the concave side of the bowl, similar to its lighter congeners, CoB _(12) ~(?) and RhB _(12) ~(?) clusters. Although all these MB _(12) ~(?) (M = Co, Rh, Ir) clusters show dynamical behaviour, analogous to that of the so-called ‘Wankel motors’, the energy barrier for the rotation of the inner B _(3) ring within the peripheral B _(9) ring is the lowest in the IrB _(12) ~(?) case (5.0 kcal mol ~(?1) only). The geometrical feature along with the lower interaction energy between B _(3) and MB _(9) moieties are responsible for a smaller rotational energy barrier in IrB _(12) ~(?) than those in CoB _(12) ~(?) and RhB _(12) ~(?) clusters.
机译:IRB _(12)〜(?)的全局最小值是一个C _(3V)对称碗状结构,其中IR原子位于碗的凹面上,类似于其较轻的同学,COB _(12 )〜(?)和rhb _(12)〜(?)簇。虽然所有这些MB _(12)〜(?)(m = co,Rh,IR)集群显示动态行为,类似于所谓的“wankel电动机”的动态行为,为内部b旋转的能量屏障(3)外围B _(9)环内的环是IRB _(12)〜(?)案例中最低(仅5.0千卡Mol〜(?1))。几何特征以及B _(3)和MB _(9)部分之间的较低的相互作用能量负责IRB _(12)〜(?)中较小的旋转能量屏障,而不是COB _(12)〜( ?)和rhb _(12)〜(?)簇。

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