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Zuckerman LA, Vargo NP, May CV, Crockett MP, Hyre AS, McNeely J, Elinburg JK, Brown AM, Robinson JR, Rheingold AL, Doerrer LH. Thiolate-Thione Redox-Active Ligand with a Six-Membered Chelate Ring via Template Condensation and Its Pt(II) Complexes. Inorg Chem 2021; 60:13376-13387. [PMID: 34382778 DOI: 10.1021/acs.inorgchem.1c01693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new template condensation reaction has been discovered in a mixture of Pt(II), thiobenzamide, and base. Four complexes of the general form [Pt(ctaPhR)2], R = CH3 (1a), H (1b), F (1c), Cl (1d), cta = condensed thioamide, have been prepared under similar conditions and thoroughly characterized by 1H NMR and UV-vis-NIR spectroscopy, (spectro)electrochemistry, elemental analysis, and single-crystal X-ray diffraction. The ligand is redox active and can be reduced from the initial monoanion to a dianionic and then trianionic state. Chemical reduction of 1a with [Cp2Co] yielded [Cp2Co]2[Pt(ctaPhCH3)2], [Cp2Co]2[1a], which has been similarly characterized with the addition of EPR spectroscopy and SQUID magnetization. The singly reduced form containing [1a]1-, (nBu4N)[Pt(ctaPhCH3)2], has been generated in situ and characterized by UV-vis and EPR spectroscopies. DFT studies of 1b, [1b]1-, and [1b]2- confirm the location of additional electrons in exclusively ligand-based orbitals. A detailed analysis of this redox-active ligand, with emphasis on the characteristics that favor noninnocent behavior in six-membered chelate rings, is included.
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Affiliation(s)
- Linda A Zuckerman
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Natasha P Vargo
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Claire V May
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Michael P Crockett
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Ariel S Hyre
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - James McNeely
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Jessica K Elinburg
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Alexander M Brown
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0332, La Jolla, California 92093, United States
| | - Linda H Doerrer
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
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Cheng MC, Cheng CH, Chen PJ, Lin TS, Lee GH, Liu YC, Chiang MH, Peng SM. Helical Homometallic Trinickel String Complexes with Mixed Hard Nitrogen and Sulfur Donors: Structural and Magnetic Studies. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ming-Chuan Cheng
- Department of Chemistry, National Taiwan University, Taipei, Taiwan, ROC, 106
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, ROC, 115
| | - Chien-Hung Cheng
- Department of Chemistry, National Taiwan University, Taipei, Taiwan, ROC, 106
| | - Po-Jung Chen
- Department of Chemistry, National Taiwan University, Taipei, Taiwan, ROC, 106
| | - Tien-Sung Lin
- Department of Chemistry, National Taiwan University, Taipei, Taiwan, ROC, 106
| | - Gene-Hsiang Lee
- Department of Chemistry, National Taiwan University, Taipei, Taiwan, ROC, 106
| | - Yu-Chiao Liu
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, ROC, 115
| | - Ming-Hsi Chiang
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, ROC, 115
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, Taipei, Taiwan, ROC, 106
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, ROC, 115
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Cheng MC, Huang RX, Liu YC, Chiang MH, Lee GH, Song Y, Lin TS, Peng SM. Structures and paramagnetism of five heterometallic pentanuclear metal strings containing as many as four different metals: NiPtCo 2Pd(tpda) 4Cl 2. Dalton Trans 2020; 49:7299-7303. [PMID: 32343295 DOI: 10.1039/d0dt01088j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Five heterometallic pentanuclear metal strings were prepared by stepwise synthesis from two to three and four kinds of metals aligned in one chain. In particular, NiPtCo2Pd(tpda)4Cl2 (5) possesses four different metals, and the SQUID measurement shows that Ni2+ is the only magnetically active center. Besides, the shortest Co(ii)-Co(ii) single bond (2.105(9) Å), so far, is reported.
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Affiliation(s)
- Ming-Chuan Cheng
- Department of Chemistry, National Taiwan University, Taipei, 106 Taiwan, Republic of China. and Institute of Chemistry, Academia Sinica, Taipei, 115 Taiwan, Republic of China
| | - Rui-Xiang Huang
- Department of Chemistry, National Taiwan University, Taipei, 106 Taiwan, Republic of China.
| | - Yu-Chiao Liu
- Institute of Chemistry, Academia Sinica, Taipei, 115 Taiwan, Republic of China
| | - Ming-Hsi Chiang
- Institute of Chemistry, Academia Sinica, Taipei, 115 Taiwan, Republic of China
| | - Gene-Hsiang Lee
- Department of Chemistry, National Taiwan University, Taipei, 106 Taiwan, Republic of China.
| | - You Song
- State Key Lab of Coordination Chemistry, Nanjing National Laboratory of Microstructures and School of Chemistry and Chemical Engineering, Nanjing University, P. R. China
| | - Tien-Sung Lin
- Department of Chemistry, National Taiwan University, Taipei, 106 Taiwan, Republic of China.
| | - Shie-Ming Peng
- Department of Chemistry, National Taiwan University, Taipei, 106 Taiwan, Republic of China. and Institute of Chemistry, Academia Sinica, Taipei, 115 Taiwan, Republic of China
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Ou JH, Jin BY. Band Structures of Quasi-One-Dimensional Incommensurate Helical Systems: A Case Study of Infinite Chromium Extended Metal Atom Chain. J Phys Chem A 2018; 122:9199-9208. [PMID: 30444123 DOI: 10.1021/acs.jpca.8b07144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Extended metal atom chains (EMACs) are promising candidates for molecular wires but their band structures remain to be explored. As a quasi-one-dimensional (Q1D) system, the incommensurate helical nature of EMACs hinders such calculations. In this work, we resolved this issue via explicit implementation of helical symmetry. Moreover, the pattern of metal d bands was rationalized by a systematic investigation on a series of related Q1D helical systems. Two critical factors, helical ligand field and chemically asymmetric ligand field, are proposed and identified. We found that the symmetry and ligand fields of the system dominate the pattern of the metal d bands, instead of specific chemical composition of ligands. The presented method and rationale are applicable to not only EMACs but also related Q1D helical systems.
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Affiliation(s)
- Jen-Hao Ou
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Bih-Yaw Jin
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
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Uemura K. One-dimensional complexes extended by unbridged metal-metal bonds based on a HOMO-LUMO interaction at the d z2 orbital between platinum and heterometal atoms. Dalton Trans 2018; 46:5474-5492. [PMID: 28112315 DOI: 10.1039/c6dt04515d] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review, the crystal structures of seventeen heterometallic one-dimensional compounds 1-17 are shown, and their electronic structures are discussed based on the diffuse reflectance spectra and other physical measurements. Compounds 1-17 comprise two kinds of complexes with HOMO-LUMO interactions at σ-type (dz2) orbitals between platinum and heterometal atoms, where two or three kinds of metal are regularly aligned through metal-metal bonds. In [{PtRh(piam)2(NH3)2Cl2.5}2{Pt2(piam)2(NH3)4}2]n(PF6)6n·2nMeOH·2nH2O (3, piam = pivalamidate), the platinum and rhodium atoms are aligned as -Pt-Rh-Pt-Pt-Pt-Pt-Rh-Pt-Cl- with a mixed valence, where an unpaired electron hops from one Rh atom to another. [{Rh2(O2CCF3)4}{Pt2(piam)2(NH3)4}2]n(CF3CO2)4n·2nEtOH·2nH2O (6) with -Pt-Pt-Rh-Rh-Pt-Pt- alignment has a conduction band (CB) and a valence band (VB) attributed to σ-type orbitals, exhibiting narrower gaps between CB and VB than other analogues. [{Ru2(O2CCH3)4}{Pt2(piam)2(NH3)4}2]n(PF6)4n·4nH2O (14) with -Pt-Pt-Ru-Ru-Pt-Pt- and [{Rh2(O2CCH3)4}{Pt2Cu(piam)4(NH3)4}]n(PF6)2n (15) with -Rh-Rh-Pt-Cu-Pt- are paramagnetic chains, where one or two unpaired electrons reside at each metal per repeating unit. Thus, this system is diverse in modulating the electronic structures, band structures and the expected physical properties based on the unique oxidation states and redox properties attributed to the metal-metal interaction.
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Affiliation(s)
- Kazuhiro Uemura
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan.
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