1
|
Ernst MJ, Abdulkader A, Hagenbach A, Claude G, Roca Jungfer M, Abram U. [Tc(NO)(Cp)(PPh 3)Cl] and [Tc(NO)(Cp)(PPh 3)(NCCH 3)](PF 6), and Their Reactions with Pyridine and Chalcogen Donors. Molecules 2024; 29:1114. [PMID: 38474627 DOI: 10.3390/molecules29051114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
Reactions of the technetium(I) nitrosyl complex [Tc(NO)(Cp)(PPh3)Cl] with triphenylphosphine chalcogenides EPPh3 (E = O, S, Se), and Ag(PF6) in a CH2Cl2/MeOH mixture (v/v, 2/1) result in an exchange of the chlorido ligand and the formation of [Tc(NO)(Cp)(PPh3)(EPPh3)](PF6) compounds. The cationic acetonitrile complex [Tc(NO)(Cp)(PPh3)(NCCH3)]+ is formed when the reaction is conducted in NCCH3 without additional ligands. During the isolation of the corresponding PF6- salt a gradual decomposition of the anion was detected in the solvent mixture applied. The yields and the purity of the product increase when the BF4- salt is used instead. The acetonitrile ligand is bound remarkably strongly to technetium and exchange reactions readily proceed only with strong donors, such as pyridine or ligands with 'soft' donor atoms, such as the thioether thioxane. Substitutions on the cyclopentadienyl ring do not significantly influence the ligand exchange behavior of the starting material. 99Tc NMR spectroscopy is a valuable tool for the evaluation of reactions of the complexes of the present study. The extremely large chemical shift range of this method allows the ready detection of corresponding ligand exchange reactions. The observed 99Tc chemical shifts depend on the donor properties of the ligands. DFT calculations support the discussions about the experimental results and provide explanations for some of the unusual findings.
Collapse
Affiliation(s)
- Moritz Johannes Ernst
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | - Abdullah Abdulkader
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | - Adelheid Hagenbach
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | - Guilhem Claude
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| | | | - Ulrich Abram
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, D-14195 Berlin, Germany
| |
Collapse
|
2
|
Klein‐Heßling C, Sünkel K. Synthesis and Characterization of the Complete Series [(C
5
H
5‐n
Cl
n
)Co(C
4
Ph
4
)] (n=1–5). ChemistrySelect 2021. [DOI: 10.1002/slct.202102199] [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)
- Christian Klein‐Heßling
- Department of Chemistry Ludwig-Maximilians-University Munich Butenandtstr. 5–13 81377 Munich Germany
| | - Karlheinz Sünkel
- Department of Chemistry Ludwig-Maximilians-University Munich Butenandtstr. 5–13 81377 Munich Germany
| |
Collapse
|
3
|
Cleaves PA, Ayres AJ, Vondung L, Stewart JC, Cobb PJ, Wooles AJ, Liddle ST. Bridged and Unbridged Nickel–Nickel Bonds Supported by Cyclopentadienyl and Phosphine Ligand Sets. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Peter A. Cleaves
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Alexander J. Ayres
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Lisa Vondung
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - John C. Stewart
- School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
| | - Philip J. Cobb
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Ashley J. Wooles
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| | - Stephen T. Liddle
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
| |
Collapse
|
4
|
Chemistry of the highly stable hindered cobalt sandwich compound (η5-Cp)Co(η4-C4Ph4) and its derivatives. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.05.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Singh J, Deb M, Elias AJ. Palladacycles Based on 8-Aminoquinoline Carboxamides of Cobalt and Iron Sandwich Compounds and a New Method to α-Alkylate Cp Rings of Metal Sandwich Carboxamides. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00504] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jatinder Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz
Khas, New Delhi 110016, India
| | - Mayukh Deb
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz
Khas, New Delhi 110016, India
| | - Anil J. Elias
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz
Khas, New Delhi 110016, India
| |
Collapse
|
6
|
Affiliation(s)
- Subhayan Dey
- Department of Chemistry and ‡Saskatchewan
Structural Sciences Centre, University of Saskatchewan, 110 Science
Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - J. Wilson Quail
- Department of Chemistry and ‡Saskatchewan
Structural Sciences Centre, University of Saskatchewan, 110 Science
Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| | - Jens Müller
- Department of Chemistry and ‡Saskatchewan
Structural Sciences Centre, University of Saskatchewan, 110 Science
Place, Saskatoon, Saskatchewan S7N 5C9, Canada
| |
Collapse
|
7
|
Singh J, Kumar D, Singh N, Elias AJ. New Chiral Palladacycles from an Unprecedented Cyclopalladation of Cyclobutadiene-Bound Phenyl Groups of Cobalt Sandwich Compounds. Organometallics 2014. [DOI: 10.1021/om500004n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jatinder Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Dheeraj Kumar
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Nem Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| | - Anil J. Elias
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India
| |
Collapse
|
8
|
Keshav K, Kumar D, Elias AJ. Synthesis, spectral, and structural studies of porphyrins having sterically hindered [η(5)-CpCo(η(4)-C4Ph4)] cobalt sandwich units at the meso positions. Inorg Chem 2013; 52:12351-66. [PMID: 24152207 DOI: 10.1021/ic401099c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis, spectral, and structural studies of the first examples of porphyrins substituted at the meso positions with sterically hindered η(5)-CpCo(η(4)-C4Ph4) cobalt sandwich units are described. The novel dipyrromethane derived cobalt sandwich compound {η(5)-[(C4H4N)2CH]C5H4}Co(η(4)-C4Ph4) 1, as well as its parent aldehyde, η(5)-[C5H4(CHO)]Co(η(4)-C4Ph4), were used in the synthesis of porphyrins having one or two η(5)-CpCo(η(4)-C4Ph4) groups at their meso positions. 1,9-Diformyldipyrromethane derived η(5)-CpCo(η(4)-C4Ph4) 2 was synthesized using dipyrromethane 1 under Vilsmeier conditions. A reaction of 2 with unsubstituted dipyrromethane under basic conditions in the presence of Pd(C6H5CN)2Cl2 yielded an A-type palladium coordinated porphyrin 3 [where A = η(5)-CpCo(η(4)-C4Ph4)]. A similar reaction of 2 with meso aryl and ferrocenyl-substituted dipyrromethanes yielded trans-AB type palladium coordinated porphyrins 4-6 [where A = η(5)-CpCo(η(4)-C4Ph4) and B = 4-tert-butylphenyl 4, ferrocenyl 5, and pentafluorophenyl 6]. Reactions of 2 with 5-ferrocenyl dipyrromethane under the same reaction conditions in the presence of Ni(acac)2 and Zn(OAc)2 gave the trimetallic nickel(II) and zinc(II) complexed trans-AB type porphyrins 7 and 8 having both cobalt and iron sandwich units at the meso positions. Crystal structure of the Pd(II) porphyrin 5 and nickel(II) porphyrin 7 showed nonplanar structures having distinct ruffle type distortion of the porphyrin ring. Demetalation of the zinc(II) trans-AB type porphyrin 8 in the presence of trifluoroacetic acid gave the metal free base porphyrin 9. Reactions of the cobalt sandwich aldehyde [(η(5)-C5H4(CHO)]Co(η(4)-C4Ph4) with sterically hindered dipyrromethane derivatives under acid-catalyzed condensation reactions gave trans-A2B2 type porphyrins [where A = η(5)-CpCo(η(4)-C4Ph4) and B = pentafluorophenyl, 10 mesityl 11]. In contrast, reactions of [η(5)-C5H4(CHO)]Co(η(4)-C4Ph4) with sterically unhindered meso-4-tert-butylphenyl dipyrromethane resulted in both AB3 12 and cis-A2B2 13 type porphyrins [where A = η(5)-CpCo(η(4)-C4Ph4) and B = (4-tert-butylphenyl] as a result of scrambling. The new porphyrin derivatives have been structurally characterized, and their spectral and electrochemical features were determined.
Collapse
Affiliation(s)
- Karunesh Keshav
- Department of Chemistry, Indian Institute of Technology , Delhi, Hauz Khas, New Delhi, 110016, India
| | | | | |
Collapse
|
9
|
Mandapati P, Singh N, Kumar D, Elias AJ. Synthesis and characterization of difunctionalized derivatives of the cyclobutadiene linked dimeric cobalt sandwich compound [(η5-Cp)Co(η4-C4Ph3)]2. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.06.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
10
|
Singh N, Metla BP, Elias AJ. Synthesis and reactions of new 1,2- and 1,3-cyclopentadienyl disubstituted cobalt sandwich compounds (η5-C5H3R2)Co(η4-C4Ph4) (R CH2OH, CHO, C CH, CH2N3, CH2NH2, CH2OAc, CH NPh). J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.07.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
11
|
Garcia P, Evanno Y, George P, Sevrin M, Ricci G, Malacria M, Aubert C, Gandon V. Synthesis of Aminopyridines and Aminopyridones by Cobalt-Catalyzed [2+2+2] Cycloadditions Involving Yne-Ynamides: Scope, Limitations, and Mechanistic Insights. Chemistry 2012; 18:4337-44. [DOI: 10.1002/chem.201103906] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Indexed: 11/08/2022]
|
12
|
Singh N, Elias AJ. Cyclopentadienyl 1,2- and 1,3-Disubstituted Cobalt Sandwich Compounds {η5-[MeOC(O)]2C5H3} Co(η4-C4Ph4): Precursors for Sterically Hindered Bidentate Chiral and Achiral Ligands. Organometallics 2012. [DOI: 10.1021/om300027c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nem Singh
- Department of Chemistry, Indian Institute of Technology, Delhi,
Hauz Khas, New Delhi 110016, India
| | - Anil J. Elias
- Department of Chemistry, Indian Institute of Technology, Delhi,
Hauz Khas, New Delhi 110016, India
| |
Collapse
|
13
|
Identification and characterization of intermediates in the formation of the cyclobutadiene linked dimeric cobalt sandwich compound [( ${\eta ^{5}}$ -RCp)Co( ${\eta^{4}}$ -C 4 Ph 3 )] 2 [R ${=}$ H, CH 3 C(O)O]. J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0157-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
14
|
Bertrand G, Tortech L, Fichou D, Malacria M, Aubert C, Gandon V. An Improved Protocol for the Synthesis of [(η4-C4R4)Co(η5-C5H5)] Complexes. Organometallics 2011. [DOI: 10.1021/om200662g] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guillaume Bertrand
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
- CEA-Saclay, Organic Nanostructures and Semiconductors Group, SPCSI/IRAMIS, F-91191 Gif-sur-Yvette, France
| | - Ludovic Tortech
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
- CEA-Saclay, Organic Nanostructures and Semiconductors Group, SPCSI/IRAMIS, F-91191 Gif-sur-Yvette, France
| | - Denis Fichou
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
- CEA-Saclay, Organic Nanostructures and Semiconductors Group, SPCSI/IRAMIS, F-91191 Gif-sur-Yvette, France
| | - Max Malacria
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
| | - Corinne Aubert
- UPMC, IPCM, UMR CNRS 7201, 4 place Jussieu, 75005 Paris, France
| | - Vincent Gandon
- Université Paris-Sud 11, ICMMO, UMR CNRS 8182, F-91405 Orsay, France
| |
Collapse
|
15
|
Eichberg MJ, Kayser B, Leonard PW, Miljanić OŠ, Timofeeva TV, Vollhardt KPC, Whitener GD, Yakovenko A, Yu Y. Radial (tetracyclopentadienyl)cyclobutadiene pentametals. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
16
|
The preparation, spectroscopy, structure and electrochemistry of some [Co(η4-C4Ph4)(η5-C5H4R)] complexes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.12.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
17
|
Angamuthu R, Carroll ME, Ramesh M, Rauchfuss TB. A New Route to Azadithiolato Complexes. Eur J Inorg Chem 2011; 2011:1029-1032. [PMID: 23125531 PMCID: PMC3487702 DOI: 10.1002/ejic.201001208] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Indexed: 11/09/2022]
Abstract
The reaction of [(MeC(5)H(4))(2)Ti(SH)(2)] with cyclic imines with the formula (CH(2)NR)(3) gives 2-aza-1,3-dithiolato chelate complexes [(MeC(5)H(4))(2)Ti{(SCH(2))(2)NR}] (1, R = Ph; 2, R = Me; 3, R = CH(2)Ph). These compounds demonstrate that azadithiolate ligands can exist on mononuclear metal centers. The complexes were characterized by (1)H NMR spectroscopy, ESI-mass spectrometry, and X-ray crystallography. Variable-temperature (1)H NMR studies reveal that the dithiolate ligands undergo ring inversion like other dithiatitanacyclohexanes. Treatment of [(MeC(5)H(4))(2)Ti{(SCH(2))(2)NPh}] (1) with [Fe(benzylideneacetone)(CO)(3)] afforded [Fe(2){(SCH(2))(2)NPh}(CO)(6)] in good yield.
Collapse
Affiliation(s)
- Raja Angamuthu
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Maria E. Carroll
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Maya Ramesh
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| |
Collapse
|
18
|
Singh N, Elias AJ. Palladacycles of novel bisoxazoline chelating ligands based on the dimeric cyclobutadiene linked cobalt sandwich compound [(η5-Cp)Co(η4-C4Ph3)]2. Dalton Trans 2011; 40:4882-91. [DOI: 10.1039/c0dt01737j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Nem Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | | |
Collapse
|