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Synthesis, properties, and ligating behavior of the first facultative tritelluroethers, Te(CH2CH2CH2TeR)(2) (R = Me or Ph)

Synthesis, properties, and ligating behavior of the first facultative tritelluroethers, Te(CH2CH2CH2TeR)(2) (R = Me or Ph)
Synthesis, properties, and ligating behavior of the first facultative tritelluroethers, Te(CH2CH2CH2TeR)(2) (R = Me or Ph)
The first examples of linear tritelluroether ligands, Te(CH2CH2CH2TeR)(2) [L, R = Me (LI) or Ph (L-2)], have been prepared from Na2Te and RTeCH2CH2CH2Cl and fully characterized spectroscopically and by quaternization with MeI to the corresponding telluronium. salts, MeITe(CH2CH2CH2TeRMeI)(2). A series of metal complexes have been prepared, the metal substrate being chosen to illustrate the ligating modes available to these ligands and to permit comparison with literature data on complexes of Se(CH2CH2CH2SeMe)(2) and MeC(CH2TeR)(3), In fac-[Mn(CO)3(L)] CF3SO3 the ligands bind as tridentates facially to the metal center, whereas in [PtCl(L)]PF6 the ligands occupy three positions on the square-planar metal center. The [{eta (5)-C5Me5}Rh(L)](PF6)(2) contain tridentate L bound to one triangular face of the octahedron. The X-ray crystal structure of [{eta (5)-C5Me5}Rh(L-2)](PF6)(2). MeOH shows tridentate telluroether coordination with the ligand adopting the DL configuration, giving a distorted pseudo-octahedral environment at Rh(III). A short contact between one C-H group in one of the phenyl rings and the centroid of the other phenyl ring (2.56 Angstrom) helps to stabilize the adopted configuration. The metal complexes have been characterized by analysis, ES+ or FAB mass spectrometry, and IR and multinuclear NMR (H-1, C-13{H-1}, Te-125) spectroscopy. The invertomers present in coordinated L have been established by the multinuclear NMR studies.
nuclear magnetic-resonance, ditelluroether complexes, metal-complexes, selenoether, ligands, coordination, chemistry, te-125, shifts, pd
0276-7333
3644-3649
Barton, Andrew J.
d30729b8-2d8c-45ca-bd13-35a696f6e255
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Ward, Antony J.
2507b65c-8b65-426d-89ce-ff2ac3768299
Barton, Andrew J.
d30729b8-2d8c-45ca-bd13-35a696f6e255
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Ward, Antony J.
2507b65c-8b65-426d-89ce-ff2ac3768299

Barton, Andrew J., Levason, William, Reid, Gillian and Ward, Antony J. (2001) Synthesis, properties, and ligating behavior of the first facultative tritelluroethers, Te(CH2CH2CH2TeR)(2) (R = Me or Ph). Organometallics, 20 (17), 3644-3649. (doi:10.1021/om0102495).

Record type: Article

Abstract

The first examples of linear tritelluroether ligands, Te(CH2CH2CH2TeR)(2) [L, R = Me (LI) or Ph (L-2)], have been prepared from Na2Te and RTeCH2CH2CH2Cl and fully characterized spectroscopically and by quaternization with MeI to the corresponding telluronium. salts, MeITe(CH2CH2CH2TeRMeI)(2). A series of metal complexes have been prepared, the metal substrate being chosen to illustrate the ligating modes available to these ligands and to permit comparison with literature data on complexes of Se(CH2CH2CH2SeMe)(2) and MeC(CH2TeR)(3), In fac-[Mn(CO)3(L)] CF3SO3 the ligands bind as tridentates facially to the metal center, whereas in [PtCl(L)]PF6 the ligands occupy three positions on the square-planar metal center. The [{eta (5)-C5Me5}Rh(L)](PF6)(2) contain tridentate L bound to one triangular face of the octahedron. The X-ray crystal structure of [{eta (5)-C5Me5}Rh(L-2)](PF6)(2). MeOH shows tridentate telluroether coordination with the ligand adopting the DL configuration, giving a distorted pseudo-octahedral environment at Rh(III). A short contact between one C-H group in one of the phenyl rings and the centroid of the other phenyl ring (2.56 Angstrom) helps to stabilize the adopted configuration. The metal complexes have been characterized by analysis, ES+ or FAB mass spectrometry, and IR and multinuclear NMR (H-1, C-13{H-1}, Te-125) spectroscopy. The invertomers present in coordinated L have been established by the multinuclear NMR studies.

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More information

Published date: 20 August 2001
Keywords: nuclear magnetic-resonance, ditelluroether complexes, metal-complexes, selenoether, ligands, coordination, chemistry, te-125, shifts, pd

Identifiers

Local EPrints ID: 19395
URI: https://eprints.soton.ac.uk/id/eprint/19395
ISSN: 0276-7333
PURE UUID: 888c239c-c476-4b91-a067-4511f6e0087c
ORCID for William Levason: ORCID iD orcid.org/0000-0003-3540-0971
ORCID for Gillian Reid: ORCID iD orcid.org/0000-0001-5349-3468

Catalogue record

Date deposited: 14 Feb 2006
Last modified: 16 Jul 2019 19:08

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