2022
DOI: 10.1002/cplu.202100487
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Effects of Dispersion and Charge‐Transfer Interactions on Structures of Heavy Chalcogenide Compounds: A Quantum Chemical Case Study for (Et2Bi)2Te

Abstract: The reasons for the unusually small BiÀ TeÀ Bi bond angle of 86.6°observed in the crystal strucure of (Et 2 Bi) 2 Te are investigated by quantum chemical calculations. With the help of coupled cluster theory at the CCSD(T) level it is demonstrated that the structure of an isolated monomer should have a bond angle larger than 90°, despite a BiÀ Bi distance in good agreement with the value of 4.09 Å found in the crystal structure. The discrepancy is resolved by a lengthening of the BiÀ Te bond in the crystal, wh… Show more

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