2,5-Diiodothiophene: A Versatile Halogen Bonding Synthon for Crystal Engineering

2,5-Diiodothiophene: A Versatile Halogen Bonding Synthon for Crystal Engineering
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2,5-二碘噻吩:用于晶体工程的多功能卤素键合成剂

DOI:
10.1021/acs.cgd.1c01466
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发表时间:
2022
影响因子:
3.8
通讯作者:
Pennington, William T.
Pennington, William T.
中科院分区:
化学2区
文献类型:
--
作者:
Ragusa, Arianna C.;Peloquin, Andrew J.;McMillen, Colin D.;Pennington, William T.

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相对于常见的基于二碘苯的卤键给体,碘取代噻吩化合物的卤键知之甚少。使用含硫原子的卤键供体2,5-二碘噻吩与N-杂环二胺以及碘化铵盐进行了一系列共结晶实验。这些结果揭示了与卤素键供体/受体化学计量有关的广泛的卤素键合基序。虽然在富受体化学计量中,离散单元通过C-I···I卤键占主导地位,富供体化学计量鼓励形成二维卤素键合网络,通常还涉及C-I···S和S···S相互作用。通过C-I碘原子的卤素键合在所有结构中占主导地位。测量的卤素键距离落在通常观察到的1,4-二碘苯和1,4-二碘四氟苯之间,重申了卤素键在加强卤素键中的作用,同时也将卤素键合的卤素键合的卤素键合离子库扩展到具有中间静电势的供体。
Relative to the common diiodobenzene-based halogen bond donors, little is known about the halogen bonding of iodine-substituted thiophene compounds. A series of co-crystallization experiments were performed using the sulfur-atom-containing halogen bond donor 2,5-diiodothiophene withN-heterocyclic diamines, as well as ammonium iodide salts. These results reveal a wide range of halogen bonding motifs tied to the halogen bond donor/acceptor stoichiometry. While, in acceptor-rich stoichiometries, discrete units prevail through C–I···I halogen bonds, donor-rich stoichiometries encourage the formation of two-dimensional halogen bonding networks, often with the additional involvement C–I···S and S···S interactions. Halogen bonding through the C–I iodine atom predominates in all structures. The measured halogen bond distances fall between those typically observed for 1,4-diiodobenzene and 1,4-diiodotetrafluorobenzene, reaffirming the role of fluorination in strengthening the halogen bond while also expanding the library of halogen bonding synthons to donors having intermediate electrostatic potentials.
二噻烷/碘氟苯混合物中的卤素键合:一类新型疏水性低共熔溶剂。
DOI: 10.1002/anie.202110520
发表时间: 2021
期刊: Angewandte Chemie
影响因子: --
作者:
Andrew J. Peloquin;Jena M. McCollum;C. McMillen;W. Pennington
通讯作者: W. Pennington
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