Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH 2SiMe3, CH2CMe3 and CF3

Paul J. Toscano; Linda Lettko; E. James Schermerhorn; John Waechter; Kevin Shufon; Shuncheng Liu; Evgeny V. Dikarev; Jon Zubieta

doi:10.1016/S0277-5387(03)00408-X

Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH ₂SiMe₃, CH₂CMe₃ and CF₃

Paul J. Toscano, Linda Lettko, E. James Schermerhorn, John Waechter, Kevin Shufon, Shuncheng Liu, Evgeny V. Dikarev, Jon Zubieta

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A series of Co(III) diphenylglyoximato (dpgh) complexes, pyCo(dpgh) ₂R, with R = Cl (2a), CH₃ (3a), CH₂Me (4a), (CH₂)₂Me (5a), (CH₂)₃Me (6a), CHMe₂ (7a), CH₂SiMe₃ (8a), CH ₂CMe₃ (9a), CH₂CH=CH₂ (10a), CH ₂Ph (11a), and CF₃ (12a) were prepared, using Co(dpgh)(dpgh₂)Cl2 (1a) as an entry to this system. The compounds were thoroughly characterized by ¹H and ¹³C NMR spectroscopy, the spectra of which were compared to the corresponding Co(III) dimethylglyoximato (DH) complexes, pyCo(DH)₂R (2b-12b). The NMR results suggest that the dpgh ligand is less electron-donating than DH. X-ray diffraction studies of complexes 8a, 9a and 12a demonstrate that subtle, but detectable structural changes occur upon substitution of dpgh for DH, due to increased interactions of the axial alkyl ligand with the equatorial ligand set.

Original language	English (US)
Pages (from-to)	2809-2820
Number of pages	12
Journal	Polyhedron
Volume	22
Issue number	20
DOIs	https://doi.org/10.1016/S0277-5387(03)00408-X
State	Published - Sep 1 2003

Keywords

Cobaloximes
Cobalt(III) complexes
Crystal structures
Dimethylglyoximato ligands
Diphenylglyoximato ligands
NMR spectroscopy

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/S0277-5387(03)00408-X

Cite this

Toscano, P. J., Lettko, L., Schermerhorn, E. J., Waechter, J., Shufon, K., Liu, S., Dikarev, E. V., & Zubieta, J. (2003). Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH ₂SiMe₃, CH₂CMe₃ and CF₃. Polyhedron, 22(20), 2809-2820. https://doi.org/10.1016/S0277-5387(03)00408-X

Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH ₂SiMe₃, CH₂CMe₃ and CF₃. / Toscano, Paul J.; Lettko, Linda; Schermerhorn, E. James et al.
In: Polyhedron, Vol. 22, No. 20, 01.09.2003, p. 2809-2820.

Research output: Contribution to journal › Article › peer-review

Toscano, PJ, Lettko, L, Schermerhorn, EJ, Waechter, J, Shufon, K, Liu, S, Dikarev, EV & Zubieta, J 2003, 'Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH ₂SiMe₃, CH₂CMe₃ and CF₃', Polyhedron, vol. 22, no. 20, pp. 2809-2820. https://doi.org/10.1016/S0277-5387(03)00408-X

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title = "Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH 2SiMe3, CH2CMe3 and CF3",

abstract = "A series of Co(III) diphenylglyoximato (dpgh) complexes, pyCo(dpgh) 2R, with R = Cl (2a), CH3 (3a), CH2Me (4a), (CH2)2Me (5a), (CH2)3Me (6a), CHMe2 (7a), CH2SiMe3 (8a), CH 2CMe3 (9a), CH2CH=CH2 (10a), CH 2Ph (11a), and CF3 (12a) were prepared, using Co(dpgh)(dpgh2)Cl2 (1a) as an entry to this system. The compounds were thoroughly characterized by 1H and 13C NMR spectroscopy, the spectra of which were compared to the corresponding Co(III) dimethylglyoximato (DH) complexes, pyCo(DH)2R (2b-12b). The NMR results suggest that the dpgh ligand is less electron-donating than DH. X-ray diffraction studies of complexes 8a, 9a and 12a demonstrate that subtle, but detectable structural changes occur upon substitution of dpgh for DH, due to increased interactions of the axial alkyl ligand with the equatorial ligand set.",

keywords = "Cobaloximes, Cobalt(III) complexes, Crystal structures, Dimethylglyoximato ligands, Diphenylglyoximato ligands, NMR spectroscopy",

author = "Toscano, {Paul J.} and Linda Lettko and Schermerhorn, {E. James} and John Waechter and Kevin Shufon and Shuncheng Liu and Dikarev, {Evgeny V.} and Jon Zubieta",

note = "Funding Information: We thank the University at Albany Faculty Research Award Program (P.J.T.) for partial financial support. P.J.T. and E.V.D. thank the National Science Foundation for funding the CCD diffractometer (CHE-0130985) at the University at Albany. ",

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doi = "10.1016/S0277-5387(03)00408-X",

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T1 - Synthesis and characterization of diphenylglyoximato cobalt(III) complexes. The molecular structures of trans-bis(diphenylglyoximato)(alkyl)(pyridine)cobalt(III), with alkyl = CH 2SiMe3, CH2CMe3 and CF3

AU - Toscano, Paul J.

AU - Lettko, Linda

AU - Schermerhorn, E. James

AU - Waechter, John

AU - Shufon, Kevin

AU - Liu, Shuncheng

AU - Dikarev, Evgeny V.

AU - Zubieta, Jon

N1 - Funding Information: We thank the University at Albany Faculty Research Award Program (P.J.T.) for partial financial support. P.J.T. and E.V.D. thank the National Science Foundation for funding the CCD diffractometer (CHE-0130985) at the University at Albany.

PY - 2003/9/1

Y1 - 2003/9/1

N2 - A series of Co(III) diphenylglyoximato (dpgh) complexes, pyCo(dpgh) 2R, with R = Cl (2a), CH3 (3a), CH2Me (4a), (CH2)2Me (5a), (CH2)3Me (6a), CHMe2 (7a), CH2SiMe3 (8a), CH 2CMe3 (9a), CH2CH=CH2 (10a), CH 2Ph (11a), and CF3 (12a) were prepared, using Co(dpgh)(dpgh2)Cl2 (1a) as an entry to this system. The compounds were thoroughly characterized by 1H and 13C NMR spectroscopy, the spectra of which were compared to the corresponding Co(III) dimethylglyoximato (DH) complexes, pyCo(DH)2R (2b-12b). The NMR results suggest that the dpgh ligand is less electron-donating than DH. X-ray diffraction studies of complexes 8a, 9a and 12a demonstrate that subtle, but detectable structural changes occur upon substitution of dpgh for DH, due to increased interactions of the axial alkyl ligand with the equatorial ligand set.

AB - A series of Co(III) diphenylglyoximato (dpgh) complexes, pyCo(dpgh) 2R, with R = Cl (2a), CH3 (3a), CH2Me (4a), (CH2)2Me (5a), (CH2)3Me (6a), CHMe2 (7a), CH2SiMe3 (8a), CH 2CMe3 (9a), CH2CH=CH2 (10a), CH 2Ph (11a), and CF3 (12a) were prepared, using Co(dpgh)(dpgh2)Cl2 (1a) as an entry to this system. The compounds were thoroughly characterized by 1H and 13C NMR spectroscopy, the spectra of which were compared to the corresponding Co(III) dimethylglyoximato (DH) complexes, pyCo(DH)2R (2b-12b). The NMR results suggest that the dpgh ligand is less electron-donating than DH. X-ray diffraction studies of complexes 8a, 9a and 12a demonstrate that subtle, but detectable structural changes occur upon substitution of dpgh for DH, due to increased interactions of the axial alkyl ligand with the equatorial ligand set.

KW - Cobaloximes

KW - Cobalt(III) complexes

KW - Crystal structures

KW - Dimethylglyoximato ligands

KW - Diphenylglyoximato ligands

KW - NMR spectroscopy

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SN - 0277-5387

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EP - 2820

JO - Polyhedron

JF - Polyhedron

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