Bis-organoamide complexes of nitrosyl[tris(3,5-dimethylpyrazolyl)borato]molybdenum and -tungsten. The crystal and molecular structure of [Mo(NO){HB(Me2pz)3}(NHBun)2]
| Autor: | Chris Jones, Thomas A. Hamor, Keith Paxton, Jon A. McCleverty, Najat Al Obaidi |
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| Rok vydání: | 1986 |
| Předmět: | |
| Zdroj: | Journal of the Chemical Society, Dalton Transactions. :1525 |
| ISSN: | 1364-5447 0300-9246 |
| DOI: | 10.1039/dt9860001525 |
| Popis: | The reaction between [MO(NO)L(I)(NHR1)][L = tris(3,5-dimethylpyrazolyl)borate, HB(Me2pz)3–; R1= Et, Prn, or Bun] and R1NH– afforded [Mo(NO)L(NHR1)2] but did not provide a route to derivatives in which R1= aryl. A similar approach using [W(NO)L(Cl)(NHR1)] and R1NH– afforded the tungsten analogues [W(NO)L(NHR1)2](R1= Et, Prn, or Bun). The reaction of [Mo(NO)L(I)(NHR1)](R1= Et, Ph, or C6H4Me-p) with NaC10H8 in tetrahydrofuran, followed by the addition of R2NH2(R2= Ph or C6H4Me-p), led to the formation of the arylamide derivatives [Mo(NO)L(NHR1)(NHR2)](R1= R2= Ph or C6H4Me-p; R1= C6H4Me-p, R2= Ph; and R1= Et, R2= C6H4Me-p). Bis-arylamide derivatives of tungsten could not be prepared in this manner but [W(NO)L(NHEt)(NHC6H4Me-p)] was prepared from the reaction of NHC6H4Me-p– and [W(NO)L(Cl)(NHEt)]. The electrochemistry of the new complexes has been investigated and, while the bis-arylamide derivatives exhibited reversible reduction behaviour, the alkylamide complexes reduced irreversibly. The molecular structure of [Mo(NO){HB(Me2pz)3}(NHBun)2] has been determined by a single-crystal X-ray diffraction study and was found to contain a linear nitrosyl ligand. The average Mo–N(butylamido) distance was 1.940 A and the average Mo–N–Bun angle 129.9°. |
| Databáze: | OpenAIRE |
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