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Mukhopadhyay S, Patro AG, Vadavi RS, Nembenna S. Coordination chemistry of main group metals with organic isocyanides. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sayantan Mukhopadhyay
- National Institute of Science Education and Research Schoool of Chemical Sciences INDIA
| | - A Ganesh Patro
- National Institute of Science Education and Research School of Chemical Sciences INDIA
| | - Ramesh S. Vadavi
- National Institute of Science Education and Research School of Chemical Sciences INDIA
| | - Sharanappa Nembenna
- National Institute of Science Education and Research (NISER) School of Chemical Sciences Jatni CampusNISER, BhubaneswarINDIA 752050 Bhubaneswar INDIA
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Gendy C, Mikko Rautiainen J, Mailman A, Tuononen HM. Low-Valent Germanylidene Anions: Efficient Single-Site Nucleophiles for Activation of Small Molecules. Chemistry 2021; 27:14405-14409. [PMID: 34403540 PMCID: PMC8596740 DOI: 10.1002/chem.202102804] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Indexed: 11/09/2022]
Abstract
Rare mononuclear and helical chain low-valent germanylidene anions supported by cyclic (alkyl)(amino)carbene and hypermetallyl ligands were synthesised by stepwise reduction from corresponding germylene precursors via stable and isolable germanium radicals. The electronic structures of the anions can be described with ylidene and ylidone resonance forms with the Ge-C π-electrons capable of binding even weak electrophiles. The germanylidene anions reacted with CO2 to give μ-CO2 -κC:κO complexes, a rare coordination mode for low-valent germanium and inaccessible for the related neutral germylones. These results implicate low-valent germanylidene anions as efficient single-site nucleophiles for activation of small molecules.
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Affiliation(s)
- Chris Gendy
- Department of ChemistryNanoScience CentreUniversity of JyväskyläP.O. Box. 3540014JyväskyläFinland
| | - J. Mikko Rautiainen
- Department of ChemistryNanoScience CentreUniversity of JyväskyläP.O. Box. 3540014JyväskyläFinland
| | - Aaron Mailman
- Department of ChemistryNanoScience CentreUniversity of JyväskyläP.O. Box. 3540014JyväskyläFinland
| | - Heikki M. Tuononen
- Department of ChemistryNanoScience CentreUniversity of JyväskyläP.O. Box. 3540014JyväskyläFinland
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Zechovský J, Mrózek O, Samsonov M, Jambor R, RůŽička A, Dostál L. Coordination capabilities of bis-(2-pyridyl)amides in the field of divalent germanium, tin and lead compounds. Dalton Trans 2021; 50:6321-6332. [PMID: 33885114 DOI: 10.1039/d1dt00717c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of two lithium amides derived from bis-(2-pyridyl)amine (dpa)H or its methyl-substituted congener bis-(6-methyl-2-pyridyl)amine (Me-dpa)H, i.e. (dpa)Li (1) and (Me-dpa)Li (2), toward ECl2 (where E = Ge (dioxane complex) and Sn) is reported. This study produced both heteroleptic complexes (dpa)GeCl (3), [(dpa)SnCl]2 (4), and (Me-dpa)GeCl (5) and homoleptic complexes (dpa)2E (E = Ge (6) or Sn (7)) and (Me-dpa)2E (E = Ge (8) or Sn (9)). The structures of all complexes were established by single-crystal X-ray diffraction analysis showing significant differences depending on the E atom and ligand used. By contrast, in solution, the majority of compounds showed a fluxional behaviour as demonstrated by the NMR study. Finally, it turned out that the Me-dpa ligand, unlike dpa, is able to form ate complexes [(Me-dpa)3E]Li (E = Ge (10), Sn (11) or Pb (12)), whose structures were determined by single-crystal X-ray diffraction analysis. This study revealed the formation of two isomers for Ge and Sn complexes depending on the coordination preference of the lithium atom being coordinated either by nitrogen donors (10-12) or solely by the Ge or Sn electron lone pair (10a and 11a). Furthermore, the NMR experiments proved that the germanium complex 10 exhibits only limited stability in solution and decomposes to germylene 8 and lithium amide 2.
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Affiliation(s)
- Jan Zechovský
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic.
| | - Ondřej Mrózek
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic. and Faculty of Chemistry and Chemical Biology, TU Dortmund University, 44227 Dortmund, Germany
| | - Maksim Samsonov
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic.
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic.
| | - Aleš RůŽička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic.
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic.
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Mahawar P, Wasson MK, Sharma MK, Jha CK, Mukherjee G, Vivekanandan P, Nagendran S. A Prelude to Biogermylene Chemistry*. Angew Chem Int Ed Engl 2020; 59:21377-21381. [PMID: 33462912 DOI: 10.1002/anie.202004551] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Indexed: 11/07/2022]
Abstract
The biological applications of germylenes remain unrealised owing to their unstable nature. We report the isolation of air-, water-, and culture-medium-stable germylene DPMGeOH (3; DPM=dipyrromethene ligand) and its potential biological application. Compound 3 exhibits antiproliferative effects comparable to that of cisplatin in human cancer cells. The cytotoxicity of compound 3 on normal epithelial cells is minimal and is similar to that of the currently used anticancer drugs. These findings provide a framework for a plethora of biological studies using germylenes and have important implications for low-valent main-group chemistry.
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Affiliation(s)
- Pritam Mahawar
- Department of Chemistry, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India
| | - Mishi Kaushal Wasson
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India.,Amity Institute of Virology and Immunology, Amity University, Noida, Sector 125, Uttar Pradesh, 201303, India
| | - Mahendra Kumar Sharma
- Department of Chemistry, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India
| | - Chandan Kumar Jha
- Department of Chemistry, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India
| | - Goutam Mukherjee
- Department of Chemistry, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India
| | - Perumal Vivekanandan
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India
| | - Selvarajan Nagendran
- Department of Chemistry, Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas, New Delhi, 110016, India
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Mahawar P, Wasson MK, Sharma MK, Jha CK, Mukherjee G, Vivekanandan P, Nagendran S. A Prelude to Biogermylene Chemistry**. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pritam Mahawar
- Department of Chemistry Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
| | - Mishi Kaushal Wasson
- Kusuma School of Biological Sciences Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
- Amity Institute of Virology and Immunology Amity University Noida, Sector 125 Uttar Pradesh 201303 India
| | - Mahendra Kumar Sharma
- Department of Chemistry Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
| | - Chandan Kumar Jha
- Department of Chemistry Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
| | - Goutam Mukherjee
- Department of Chemistry Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
| | - Perumal Vivekanandan
- Kusuma School of Biological Sciences Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
| | - Selvarajan Nagendran
- Department of Chemistry Indian Institute of Technology Delhi (IIT Delhi), Hauz Khas New Delhi 110016 India
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