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Claude G, Genz J, Weh D, Roca Jungfer M, Hagenbach A, Gembicky M, Figueroa JS, Abram U. Mixed-Isocyanide Complexes of Technetium under Steric and Electronic Control. Inorg Chem 2022; 61:16163-16176. [PMID: 36167508 DOI: 10.1021/acs.inorgchem.2c02730] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reactions of the alkyl isocyanide fac-[Tc(CO)3(CNR)2Cl] complexes (2) (CNR = CNnBu or CNtBu) with the sterically encumbered isocyanide CNp-FArDarF2 [DArF = 3,5-(CF3)2C6H3] allow a selective exchange of the carbonyl ligands of 2 and the isolation of the mixed-isocyanide complexes mer,trans-[Tc(CNp-FArDarF2)3(CNR)2Cl] (3). Depending on the steric requirements of the residues R, the remaining chlorido ligand can be replaced by another isocyanide ligand. Cationic complexes such as mer-[Tc(CNp-FArDarF2)3(CNnBu)3]+ (4a) or mer,trans-[Tc(CNp-FArDarF2)3(CNnBu)2(CNtBu)]+ (6) have been prepared in this way and isolated as their PF6- salts. mer,trans-[Tc(CNp-FArDarF2)3(CNnBu)2(CNtBu)](PF6) represents to the best of our knowledge the first transition-metal complex with three different isocyanides in its coordination sphere. Since the degree of the ligand exchange seems to be controlled both by the electronic and steric measures of the incoming isocyanides, we undertook similar reactions with the sterically less demanding p-fluorophenyl isocyanide, CNPhpF, which indeed readily led to the hexakis(isocyanide)technetium(I) cation through an exchange of all ligands in the staring materials [Tc2(CO)6(μ-Cl)3]- or fac-[Tc(CO)3(CNR)2Cl]. The influence of the substituents at the isocyanide ligands in such reactions has been reasoned with the density functional theory-derived electrostatic potential at the accessible surface of the corresponding isocyanide carbon atoms.
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Affiliation(s)
- Guilhem Claude
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany
| | - Jonas Genz
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany
| | - Dominik Weh
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany
| | - Maximilian Roca Jungfer
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany
| | - Adelheid Hagenbach
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany
| | - Milan Gembicky
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, San Diego, California 92093, United States
| | - Joshua S Figueroa
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, San Diego, California 92093, United States
| | - Ulrich Abram
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin 14195, Germany
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Jungfer MR, Elsholz L, Abram U. Technetium Hydrides Revisited: Syntheses, Structures, and Reactions of [TcH3(PPh3)4] and [TcH(CO)3(PPh3)2]. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maximilian Roca Jungfer
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - Laura Elsholz
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
| | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195 Berlin, Germany
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Stach J, Abram U, Münze R. Gemischtligandkomplexe des Technetiums; Massenspektrometrische Untersuchungen an [Te(PP)2)(SEt2)]+-Komplexen. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/zfch.19890290707] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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4
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5
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Dinitrile complexes with a rare cis-diphosphine rhenium(I) centre: syntheses, properties and cis- to trans-isomerization. J Organomet Chem 1996. [DOI: 10.1016/s0022-328x(96)06566-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Rochon FD, Melanson R, Kong PC. Synthesis and crystal structure of mixed-ligand Tc(I) complexes, with dimethylphenylphosphine and t-butylisonitrile. Inorganica Chim Acta 1996. [DOI: 10.1016/0020-1693(95)04820-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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7
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Mixed-ligand complexes of technetium XIII. A new and facile synthesis, structure and electrochemical behaviour of trans-[Tc(dppe)2(butNC)2](PF6)· ethanol (dppe = bis(diphenylphosphino)ethane, butNC= tert-butylisocyanide). Inorganica Chim Acta 1995. [DOI: 10.1016/0020-1693(94)04200-f] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fátima M, Silva CD, Duarte M, Galvão AM, Silva JJD, Pombeiro AJ. The cis-Re(Ph2PCH2CH2PPh2)2)+ metal centre. Synthesis and molecular structure of the dinitrile complex cis-[Re(NCC6H4Me-4 2(Ph 2 PCH 2 CH 2 PPh 2 2 ][BF4]. J Organomet Chem 1992. [DOI: 10.1016/0022-328x(92)80161-p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Kaden L, Findeisen M, Lorenz B, Schmidt K, Wahren M. HTc(N2)(dppe)2 as starting material for mixed-ligand complexes of technetium(I). Inorganica Chim Acta 1992. [DOI: 10.1016/s0020-1693(00)80355-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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O'Connell LA, Davison A. Preparation and characterization of the complexes [Tc(CNtBu)x(PPh3)6−x]PF6 (x=4, 5). Inorganica Chim Acta 1990. [DOI: 10.1016/s0020-1693(00)85081-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Abram U, Beyer R, Münze R, Stach J, Kaden L, Lorenz B, Findeisen M. Mixed-ligand complexes of technetium-III. Synthesis and characterization of [bis(diphenylphosphino)ethane]tetrakis(trimethylphosphite)technetium(I) hexafluorophosphate, [Tc(DPPE)(TMP)4]PF6. Polyhedron 1989. [DOI: 10.1016/s0277-5387(00)81140-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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