Conversion between Doubly and Triply Carboxylate Bridged Bis(ethylzinc) Complexes and Formation of the (μ-Oxo)tetrazinc Carboxylate [Zn[subscript 4]O(Ar[superscript Tol]CO[subscript 2)[subscript 6]]
Ethylzinc 2,6-bis(p-tolyl)benzoate converts between two forms in solution. Through NMR spectroscopic techniques and X-ray crystallography, the species in equilibrium were identified as [Zn[subscript 2](Ar[superscript Tol]CO[subscript 2])[subscript 2](Et)[subscript 2](THF)[subscript 2]] (1), [Zn[subs...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Chemical Society (ACS)
2015
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| Online Access: | http://hdl.handle.net/1721.1/95742 https://orcid.org/0000-0002-2693-4982 https://orcid.org/0000-0002-8346-9570 |
| Summary: | Ethylzinc 2,6-bis(p-tolyl)benzoate converts between two forms in solution. Through NMR spectroscopic techniques and X-ray crystallography, the species in equilibrium were identified as [Zn[subscript 2](Ar[superscript Tol]CO[subscript 2])[subscript 2](Et)[subscript 2](THF)[subscript 2]] (1), [Zn[subscript 2](Ar[superscript Tol]CO[subscript 2])[subscript 3](Et)(THF)] (2), and diethylzinc (Ar[superscript Tol] = 2,6-bis(p-tolyl)phenyl). The equilibrium provides a model for understanding the speciation between doubly and triply m-terphenylcarboxylate bridged diiron(II) and mononuclear iron(II) complexes. Evidence is presented for the occurrence of coordinatively unsaturated trigonal zinc species in solution. Both 1 and 2 decompose in air to form the T-symmetric oxozinc carboxylate [Zn[subscript 4]O(Ar[superscript Tol]CO[subscript 2])[subscript 6]] (3). |
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