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A new class of superalkali cations X3Li3+ (X=C, Si and Ge) containing three planar tetracoordinate X atom have been characterized using ab initio methods. These perfect planar high-symmetric (D3h) species are the global minimum of the systems based on extensive stochastic structural searches, followed by high level quantum chemistry calculations. The vertical electron affinities (VEAs) of the X3Li3+...
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