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Chalcogen bonding interactions in telluroether heterocycles [Te(CH2)m]n (n = 1-4; m = 3-7).
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-06-30 , DOI: 10.1002/chem.202002510
Marko Rodewald 1 , J Mikko Rautiainen 2 , Tobias Niksch 3 , Helmar Görls 1 , Raija Oilunkaniemi 4 , Wolfgang Weigand 1 , Risto S Laitinen 4
Affiliation  

The Te⋅⋅⋅Te secondary bonding interactions (SBIs) in solid cyclic telluroethers were explored by preparing and structurally characterizing a series of [Te(CH2)m]n (n=1–4; m=3–7) species. The SBIs in 1,7‐Te2(CH2)10, 1,8‐Te2(CH2)12, 1,5,9‐Te3(CH2)9, 1,8,15‐Te3(CH2)18, 1,7,13,19‐Te4(CH2)20, 1,8,15,22‐Te4(CH2)24 and 1,9,17,25‐Te4(CH2)28 lead to tubular packing of the molecules, as has been observed previously for related thio‐ and selenoether rings. The nature of the intermolecular interactions was explored by solid‐state PBE0‐D3/pob‐TZVP calculations involving periodic boundary conditions. The molecular packing in 1,7,13,19‐Te4(CH2)20, 1,8,15,22‐Te4(CH2)24 and 1,9,17,25‐Te4(CH2)28 forms infinite shafts. The electron densities at bond critical points indicate a narrow range of Te⋅⋅⋅Te bond orders of 0.12–0.14. The formation of the shafts can be rationalized by frontier orbital overlap and charge transfer.

中文翻译:

碲醚杂环 [Te(CH2)m]n 中的硫属键相互作用(n = 1-4;m = 3-7)。

通过制备一系列 [Te(CH 2 ) m ] n ( n= 1–4; m= 3–7) 物质并进行结构表征,探索了固体环状碲醚中的 Te ⋅⋅⋅ Te 二次键相互作用 ( SBI )。1,7-Te 2 (CH 2 ) 10、1,8-Te 2 (CH 2 ) 12、1,5,9-Te 3 (CH 2 ) 9、1,8,15-Te 3 ( CH 2 ) 18、1,7,13,19-Te 4 (CH 2 ) 20、1,8,15,22-Te 4 (CH 2 ) 24和 1,9,17,25-Te 4 (CH 2 ) 28导致分子的管状堆积,正如之前在相关的硫代和硒醚环中观察到的那样。通过涉及周期性边界条件的固态 PBE0-D3/pob-TZVP 计算探索了分子间相互作用的本质。1,7,13,19-Te 4 (CH 2 ) 20、1,8,15,22-Te 4 (CH 2 ) 24和 1,9,17,25-Te 4 (CH 2 )中的分子堆积28形成无限轴。键临界点处的电子密度表明 Te ⋅⋅⋅ Te 键级数范围较窄,为 0.12–0.14。轴的形成可以通过前沿轨道重叠和电荷转移来合理化。
更新日期:2020-06-30
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