Reversible Interconversion of Permethylscandocene Tellurolates and Tellurides. X-ray Structure of [(C5Me5)2Sc]2(μ-Te)

Warren E. Piers; Leonard R. MacGillivray; Michael Zaworotko

doi:10.1021/om00036a004

Reversible Interconversion of Permethylscandocene Tellurolates and Tellurides. X-ray Structure of [(C₅Me₅)₂Sc]₂(μ-Te)

Warren E. Piers
, Leonard R. MacGillivray
, Michael Zaworotko

University of Guelph
Saint Mary's University Halifax

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

Abstract

Permethylscandocene tellurolates were synthesized by insertion of tellurium into the scandium–carbon bonds of the corresponding alkyl complexes. These tellurolates were found to be thermally unstable toward elimination of TeR₂, forming the dimeric scandium μ-telluride Cp*₂ScTeScCp*₂ (2). Photochemically induced reversion of the thermal reaction was observed when a mixture of 2 and TeR₂ was irradiated under a UV lamp through a Pyrex filter. X-ray analysis of 2 reveals an Sc-Te distance of 2.7528(12) Å and an ScTeSc angle of 172.07°. These data, coupled with allene-like orien-tation of the Cp* rings about the ScTeSc unit, suggest significant π-bonding between scandium and tellurium in this compound. Crystal data for 2: tetragonal space group P4̅2₁c, a = 15.0324(7) Å, c = 18.8884(14) Å, α, β, γ = 90°, V = 4268.3(4) Å³, Z = 4, R = 0.040, R_w = 0.034 for 2092 reflections with I > 3σ(I).

Original language	English
Pages (from-to)	4723-4725
Number of pages	3
Journal	Organometallics
Volume	12
Issue number	12
DOIs	https://doi.org/10.1021/om00036a004
Publication status	Published - 1993
Externally published	Yes

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@article{e42541c481f542f6a04b755e9fa8c252,

title = "Reversible Interconversion of Permethylscandocene Tellurolates and Tellurides. X-ray Structure of [(C5Me5)2Sc]2(μ-Te)",

abstract = "Permethylscandocene tellurolates were synthesized by insertion of tellurium into the scandium–carbon bonds of the corresponding alkyl complexes. These tellurolates were found to be thermally unstable toward elimination of TeR2, forming the dimeric scandium μ-telluride Cp*2ScTeScCp*2 (2). Photochemically induced reversion of the thermal reaction was observed when a mixture of 2 and TeR2 was irradiated under a UV lamp through a Pyrex filter. X-ray analysis of 2 reveals an Sc-Te distance of 2.7528(12) {\AA} and an ScTeSc angle of 172.07°. These data, coupled with allene-like orien-tation of the Cp* rings about the ScTeSc unit, suggest significant π-bonding between scandium and tellurium in this compound. Crystal data for 2: tetragonal space group P4̅21c, a = 15.0324(7) {\AA}, c = 18.8884(14) {\AA}, α, β, γ = 90°, V = 4268.3(4) {\AA}3, Z = 4, R = 0.040, Rw = 0.034 for 2092 reflections with I > 3σ(I).",

author = "Piers, \{Warren E.\} and MacGillivray, \{Leonard R.\} and Michael Zaworotko",

year = "1993",

doi = "10.1021/om00036a004",

language = "English",

volume = "12",

pages = "4723--4725",

journal = "Organometallics",

issn = "0276-7333",

number = "12",

}

TY - JOUR

T1 - Reversible Interconversion of Permethylscandocene Tellurolates and Tellurides. X-ray Structure of [(C5Me5)2Sc]2(μ-Te)

AU - Piers, Warren E.

AU - MacGillivray, Leonard R.

AU - Zaworotko, Michael

PY - 1993

Y1 - 1993

N2 - Permethylscandocene tellurolates were synthesized by insertion of tellurium into the scandium–carbon bonds of the corresponding alkyl complexes. These tellurolates were found to be thermally unstable toward elimination of TeR2, forming the dimeric scandium μ-telluride Cp*2ScTeScCp*2 (2). Photochemically induced reversion of the thermal reaction was observed when a mixture of 2 and TeR2 was irradiated under a UV lamp through a Pyrex filter. X-ray analysis of 2 reveals an Sc-Te distance of 2.7528(12) Å and an ScTeSc angle of 172.07°. These data, coupled with allene-like orien-tation of the Cp* rings about the ScTeSc unit, suggest significant π-bonding between scandium and tellurium in this compound. Crystal data for 2: tetragonal space group P4̅21c, a = 15.0324(7) Å, c = 18.8884(14) Å, α, β, γ = 90°, V = 4268.3(4) Å3, Z = 4, R = 0.040, Rw = 0.034 for 2092 reflections with I > 3σ(I).

AB - Permethylscandocene tellurolates were synthesized by insertion of tellurium into the scandium–carbon bonds of the corresponding alkyl complexes. These tellurolates were found to be thermally unstable toward elimination of TeR2, forming the dimeric scandium μ-telluride Cp*2ScTeScCp*2 (2). Photochemically induced reversion of the thermal reaction was observed when a mixture of 2 and TeR2 was irradiated under a UV lamp through a Pyrex filter. X-ray analysis of 2 reveals an Sc-Te distance of 2.7528(12) Å and an ScTeSc angle of 172.07°. These data, coupled with allene-like orien-tation of the Cp* rings about the ScTeSc unit, suggest significant π-bonding between scandium and tellurium in this compound. Crystal data for 2: tetragonal space group P4̅21c, a = 15.0324(7) Å, c = 18.8884(14) Å, α, β, γ = 90°, V = 4268.3(4) Å3, Z = 4, R = 0.040, Rw = 0.034 for 2092 reflections with I > 3σ(I).

UR - https://www.scopus.com/pages/publications/0000686089

U2 - 10.1021/om00036a004

DO - 10.1021/om00036a004

M3 - Article

AN - SCOPUS:0000686089

SN - 0276-7333

VL - 12

SP - 4723

EP - 4725

JO - Organometallics

JF - Organometallics

IS - 12

ER -

Reversible Interconversion of Permethylscandocene Tellurolates and Tellurides. X-ray Structure of [(C₅Me₅)₂Sc]₂(μ-Te)

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