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Vorobyeva SN, Bautina SA, Shekhovtsov NA, Nikolaenkova EB, Sukhikh TS, Golubeva YA, Klyushova LS, Krivopalov VP, Rakhmanova MI, Gourlaouen C, Bushuev MB. N^N^C-Cyclometalated rhodium(III) complexes with isomeric pyrimidine-based ligands: unveiling the impact of isomerism on structural motifs, luminescence and cytotoxicity. Dalton Trans 2024; 53:8398-8416. [PMID: 38683023 DOI: 10.1039/d4dt00824c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The impact of isomerism of pyrimidine-based ligands and their rhodium(III) complexes with regard to their structures and properties was investigated. Two isomeric ligands, 4-(3,5-dimethyl-1H-pyrazol-1-yl)-2,5-diphenylpyrimidine (HL2,5) and 4-(3,5-dimethyl-1H-pyrazol-1-yl)-2,6-diphenylpyrimidine (HL2,6), were synthesized. The ligands differ by the degree of steric bulk: the molecular structure of HL2,5 is more distorted due to presence of pyrazolyl and phenyl groups in the neighbouring positions 4 and 5 of the pyrimidine ring. The complexation of HL2,5 and HL2,6 with RhCl3 leads to the sp2 C-H bond activation, resulting in the isolation of two complexes, [RhL2,5(Solv)Cl2]·nEtOH and [RhL2,6(Solv)Cl2]·nEtOH (Solv = H2O, EtOH), with the deprotonated forms of the pyrazolylpyrimidine molecules which coordinate the Rh3+ ion as N^N^C-tridentate ligands. According to DFT modelling, the mechanism of the deprotonation involves (i) the C-H bond breaking in the 2-phenyl group followed by the coordination of the C atom to the Rh atom, (ii) the protonation of coordinated chlorido ligand, (iii) the ejection of the HCl molecule and (iv) the coordination of the H2O molecule. The ligand isomerism has an impact on emission properties and cytotoxicity of the complexes. Although the excited states of the complexes effectively deactivate through S0/T1 and S0/S1 crossings associated with the cleavage of the weak H2O ligands upon excitation, the [RhL2,5(Solv)Cl2]·nEtOH complex appeared to be emissive in the solid state, while [RhL2,6(Solv)Cl2]·nEtOH is non-emissive at all. The complexes show significant cytotoxic activity against cancerous HepG2 and Hep2 cell lines, with the [RhL2,6(Solv)Cl2]·nEtOH complex being more active than its isomer [RhL2,5(Solv)Cl2]·nEtOH. On the other hand, noticeable cytotoxicity of the latter against HepG2 is supplemented by its non-toxicity against non-cancerous MRC-5 cells.
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Affiliation(s)
- Sofia N Vorobyeva
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Sof'ya A Bautina
- Novosibirsk State University, 1, Pirogova str., Novosibirsk 630090, Russia
| | - Nikita A Shekhovtsov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Elena B Nikolaenkova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia
| | - Taisiya S Sukhikh
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Yuliya A Golubeva
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Lyubov S Klyushova
- Institute of Molecular Biology and Biophysics, Federal Research Centre of Fundamental and Translational Medicine (IMBB FRC FTM), 2/12, Timakova str., 630060, Novosibirsk, Russia
| | - Viktor P Krivopalov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia
| | - Marianna I Rakhmanova
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
| | - Christophe Gourlaouen
- Laboratoire de Chimie Quantique, Institut de Chimie, UMR 7177 CNRS-Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France
| | - Mark B Bushuev
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 3, Acad. Lavrentiev Ave., Novosibirsk 630090, Russia.
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Avdeeva VV, Kubasov AS, Korolenko SE, Goeva LV, Malinina EA, Kuznetsov NT. Spontaneous Isomerization [trans-B20H18]2– → [iso-B20H18]2– during Cobalt(II) Complexation with Phenanthroline. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622080022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract
In this work, the cobalt(II) complexation with 1,10-phenanthroline (Phen) in the presence of the [trans-B20H18]2– anion has been studied. At a Co : Phen = 1 : 2 ratio in acetonitrile, a binuclear cobalt(II) complex with bridging chlorine atoms and the boron cluster anion as a counterion [(Phen)2Co(µ-Cl)2Co(Phen)2][trans-B20H18] has been isolated. However, during slow crystallization (within a month), spontaneous isomerization of [trans-B20H18]2– into [iso-B20H18]2– is observed. It has been established by X-ray diffraction analysis that in the crystal of the final compound [(Phen)2Co(µ-Cl)2Co(Phen)2][trans-B20H18]1/3[iso-B20H18]2/3, co-crystallization of both isomeric forms of the octadecahydroeicosaborate anion is observed for the first time. The presence of the iso form of the boron cluster anion is also confirmed by IR spectroscopy data: the spectrum of the product shows a band of stretching vibrations of the BHB bridge groups at 1773 cm–1, which is absent in the trans-form of the boron cluster.
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Nikiforova SE, Kubasov AS, Goeva LV, Avdeeva VV, Malinina EA, Kuznetsov NT. Features of the formation of d10 metal complexes with benzimidazoles derivatives in the presence of the closo-decaborate anion. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Gold(III) Complexation in the Presence of the Macropolyhedral Hydridoborate Cluster [B20H18]2−. INORGANICS 2022. [DOI: 10.3390/inorganics10070099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Gold(III) complexation with the octadecahydrido-eicosaborate anion [B20H18]2− was studied for the first time. It was found that when gold(III) complexes [Au(L)Cl2]BF4 (L = bipy, phen) reacted with [B20H18]2−, complexes [Au(L)Cl2]2[B20H18] were isolated. The compounds consisted of a cationic gold(III) complex [Au(L)Cl2]+ and the hydridoborate cluster as a counterion. X-ray diffraction studies revealed weak B–H...Au interactions for both compounds. Note that more reactive anions [BnHn]2− (n = 10, 12) in similar reactions with gold(III) complexes resulted in gold mirror reactions.
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He Y, Chen J, Yu X, Kao H, Chen J. Synthesis, Crystal Structures, and Magnetic Studies of Two Six-Coordinate Nickel(II) Complexes with Tripodal Benzimidazole Ligands. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622080162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Mahfouz N, Ghaida FA, El Hajj Z, Diab M, Floquet S, Mehdi A, Naoufal D. Recent Achievements on Functionalization within closo‐Decahydrodecaborate [B
10
H
10
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2−
Clusters. ChemistrySelect 2022. [DOI: 10.1002/slct.202200770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nadine Mahfouz
- Laboratoire de Chimie de Coordination Inorganique et Organométallique LCIO Université Libanaise Faculté des Sciences Hadat, Liban
- Ecole Doctorale en Sciences et Technologies PRASE Université Libanaise Hadat, Liban
- Institut Charles Gerhardt ICGM Université de Montpellier CNRS, ENSCM Montpellier France
| | - Fatima Abi Ghaida
- Laboratoire de Chimie de Coordination Inorganique et Organométallique LCIO Université Libanaise Faculté des Sciences Hadat, Liban
- Ecole Doctorale en Sciences et Technologies PRASE Université Libanaise Hadat, Liban
| | - Zeinab El Hajj
- Laboratoire de Chimie de Coordination Inorganique et Organométallique LCIO Université Libanaise Faculté des Sciences Hadat, Liban
- Ecole Doctorale en Sciences et Technologies PRASE Université Libanaise Hadat, Liban
- Institut Lavoisier de Versailles CNRS UVSQ Université Paris-Saclay 45 av. des Etats-Unis 78035 Versailles France
| | - Manal Diab
- Laboratoire de Chimie de Coordination Inorganique et Organométallique LCIO Université Libanaise Faculté des Sciences Hadat, Liban
| | - Sebastien Floquet
- Institut Lavoisier de Versailles CNRS UVSQ Université Paris-Saclay 45 av. des Etats-Unis 78035 Versailles France
| | - Ahmad Mehdi
- Institut Charles Gerhardt ICGM Université de Montpellier CNRS, ENSCM Montpellier France
| | - Daoud Naoufal
- Laboratoire de Chimie de Coordination Inorganique et Organométallique LCIO Université Libanaise Faculté des Sciences Hadat, Liban
- Ecole Doctorale en Sciences et Technologies PRASE Université Libanaise Hadat, Liban
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Korolenko SE, Kubasov AS, Khan NA, Goeva LV, Burlov AS, Divaeva LN, Malinina EA, Avdeeva VV, Zhizhin KY, Kuznetsov NT. Boron Cluster Anion [B12H12]2– in Zinc(II) and Cadmium(II) Complexation at the Presence of N-Donor Heterocyclic Ligands. J CLUST SCI 2022. [DOI: 10.1007/s10876-022-02263-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Avdeeva VV, Kubasov AS, Korolenko SE, Privalov VI, Malinina EA, Kuznetsov NT. Iron(II), cobalt(II), and nickel(II) complexes with 1,10-phenanthroline and 2,2’-bipyridyl and the macropolyhedral borane cluster [trans-B20H18]2- as counterion. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kubasov AS, Turyshev ES, Novikov IV, Gurova OM, Starodubets PA, Golubev AV, Zhizhin KY, Kuznetsov NT. Theoretical and experimental comparison of the reactivity of the sulfanyl-closo-decaborate and sulfanyl-closo-dodecaborate anions and their mono-S-substituted derivatives. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115347] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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