1
|
Chiba Y, Tanabe T, Koizumi K, Toyoda R, Iguchi H, Takaishi S, Sakamoto R. Single-Crystal Structures of Benzenehexathiol and Its Disulfide Forms. Inorg Chem 2023; 62:11731-11736. [PMID: 37436954 DOI: 10.1021/acs.inorgchem.3c01734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Oligothiols are useful as building blocks in the construction of disulfide-based macrocycles and polymers or as ligands for coordination polymers. Above all, benzenehexathiol (BHT) is a particularly important molecule, as it is used to construct conductive two-dimensional MOFs. Despite the desire to clarify its structure and isolate it to high purity, the chemical instability of BHT has hampered single-crystal X-ray structure analysis of intact BHT. In addition, the synthesis of discrete disulfide molecules of BHT has not been reported. Here, we succeed in obtaining the single crystals of intact BHT, which is analyzed by single crystal X-ray structure analysis. Furthermore, the structures of a group of molecules with intermolecular disulfide bonds (BHT·4im and BHT2·2TBA, im = imidazole, TBA = tetrabutylammonium cation) obtained by processing BHT in the presence of bases are determined.
Collapse
Affiliation(s)
- Yuta Chiba
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai, Miyagi 980-8578, Japan
| | - Tappei Tanabe
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai, Miyagi 980-8578, Japan
| | - Kazuma Koizumi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai, Miyagi 980-8578, Japan
| | - Ryojun Toyoda
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai, Miyagi 980-8578, Japan
| | - Hiroaki Iguchi
- Department of Materials Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Shinya Takaishi
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai, Miyagi 980-8578, Japan
| | - Ryota Sakamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aramaki, Sendai, Miyagi 980-8578, Japan
- Division for the Establishment of Frontier Sciences of Organization for Advanced Studies at Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| |
Collapse
|
2
|
Hua C, DeGayner JA, Harris TD. Thiosemiquinoid Radical-Bridged Cr III2 Complexes with Strong Magnetic Exchange Coupling. Inorg Chem 2019; 58:7044-7053. [PMID: 31034214 DOI: 10.1021/acs.inorgchem.9b00674] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Semiquinoid radical bridging ligands are capable of mediating exceptionally strong magnetic coupling between spin centers, a requirement for the design of high-temperature magnetic materials. We demonstrate the ability of sulfur donors to provide much stronger coupling relative to their oxygen congeners in a series of dinuclear complexes. Employing a series of chalcogen donor-based bis(bidentate) benzoquinoid bridging ligands, the series of complexes [(TPyA)2Cr2(RL4-)]2+ (OLH4 = 1,2,4,5-tetrahydroxybenzene, OSLH4 = 1,2-dithio-4,5-dihydroxybenzene, SLH4 = 1,2,4,5-tetrathiobenzene, TPyA = tris(2-pyridylmethyl)amine) was synthesized. Variable-temperature dc magnetic susceptibility data reveal the presence of weak antiferromagnetic superexchange coupling between CrIII centers in these complexes, with exchange constants of J = -2.83(3) (OL4-), -2.28(5) (OSL4-), and -1.80(2) (SL4-) cm-1. Guided by cyclic voltammetry and spectroelectrochemical measurements, chemical one-electron oxidation of these complexes gives the radical-bridged species [(TPyA)2Cr2(RL3-•)]3+. Variable-temperature dc susceptibility measurements in these complexes reveal the presence of strong antiferromagnetic metal-semiquinoid radical coupling, with exchange constants of J = -352(10) (OL3-•), - 401(8) (OSL3-•), and -487(8) (SL3-•) cm-1. These results provide the first measurement of magnetic coupling between metal ions and a thiosemiquinoid radical, and they demonstrate the value of moving from O to S donors in radical-bridged metal ions in the design of magnetic molecules and materials.
Collapse
Affiliation(s)
- Carol Hua
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
| | - Jordan A DeGayner
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
| | - T David Harris
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , United States
| |
Collapse
|
3
|
Hennessey S, Farràs P. The Quest for Sulfur-Containing Photoactive Materials: Molecular Precursors, Structures and Applications. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Seán Hennessey
- School of Chemistry; National University of Ireland, Galway; H91 CF50 Galway Ireland
| | - Pau Farràs
- School of Chemistry; National University of Ireland, Galway; H91 CF50 Galway Ireland
| |
Collapse
|
4
|
Downes CA, Marinescu SC. Understanding Variability in the Hydrogen Evolution Activity of a Cobalt Anthracenetetrathiolate Coordination Polymer. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02977] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Courtney A. Downes
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| | - Smaranda C. Marinescu
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
| |
Collapse
|