Guo B C, Kerns K P, Castleman A W
Science. 1992 Mar 13;255(5050):1411-3. doi: 10.1126/science.255.5050.1411.
During the course of studying the dehydrogenation reactions of hydrocarbons by titanium atoms, ions, and clusters, an exceptionally stable and abundant cluster which contains 8 titaniums and 12 carbons was discovered. "Titration" reactions with ND(3) reveal the uptake of eight molecules, pointing to the fact that the titanium atoms are at exposed positions of similar coordination. A dodecahedral structure of T(h) point group symmetry is proposed to account for the unusual stability of this molecular cluster. The Ti(8)C(12)(+) dodecahedron has 12 pentagonal rings and each of the rings is formed by two titanium and three carbon atoms, where each titanium is bound to three carbons. Based on the model, it is expected that neutral Ti(8)C(12) would be a stable metallo-carbododecahedral molecule and may comprise one member of a new class of molecules, namely metallo-carbohedrenes.
在研究钛原子、离子和团簇对碳氢化合物的脱氢反应过程中，发现了一种异常稳定且丰富的团簇，它含有8个钛原子和12个碳原子。与ND(3)的“滴定”反应显示吸收了8个分子，这表明钛原子处于具有相似配位的暴露位置。提出了具有T(h)点群对称性的十二面体结构来解释该分子团簇的异常稳定性。Ti(8)C(12)(+)十二面体有12个五边形环，每个环由两个钛原子和三个碳原子形成，其中每个钛原子与三个碳原子相连。基于该模型，预计中性Ti(8)C(12)将是一种稳定的金属碳十二面体分子，可能构成一类新分子（即金属碳硼烷）的一个成员。
