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Ιδρυματικό Αποθετήριο [SANDBOX]
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI: | http://purl.tuc.gr/dl/dias/E5E4EECF-346F-4A6A-8772-8EDB7345DE17 | ||
| Έτος | 1994 | ||
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | ||
| Άδεια Χρήσης |
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| Βιβλιογραφική Αναφορά | J. C Jeffery, S. S Kurek, J. A McCleverty, . E.Psillakis, R. M Richardson, M. D Ward, A.Wlodarczyk , "Syntheses of 4-Benzyl-3,5-dimethylpyrazolylborato Complexes of Molybdenum and Tungsten Nitrosyls: Molecular Structure of [ Mo( CO),( NO)(HB(3,5-Me2-4-PhCH,C,N,),)I, a Complex with an 'Inverted' Bowl-like Structure",J. of the Chem. So. Dalt. Transact. vol. 17 ,pp.2559-2564,1994.doi:10.1039/DT9940002559 https://doi.org/10.1039/DT9940002559 | ||
| Εμφανίζεται στις Συλλογές |
Reaction of [HB(bdmpz),] , obtained by reaction of 4-benzyl-3,5-dimethylpyrazole (Hbdmpz) withKBH,, with [M(CO),] (M = Mo or W) and p-MeC,H,SO,N(NO)Me afforded [M(CO),(NO)-{HB(bdmpz),}] (M = Mo or W). The molybdenum carbonyl was converted into [Mo(NO)-{HB(bdmpz),}X(Y)] (X = Y = CI, I or OC,H,Me-p; X = CI, Y = OMe or OC,H,Me-p) the spectral andelectrochemical properties of which are virtually identical to those of [Mo( NO){HB(dmpz),}X(Y)](Hdmpz = 3.5-dimethylpyrazole), indicating that the addition of a benzyl group has no significantelectronic effect in the new species. However, a crystal and molecular structure determination of[Mo(CO),( NO){HB( bdmpz),}] revealed that the molecule has a highly symmetrical structure, the CH,groups of the benzyl groups in the tris(pyrazoly1)borate ligand being disposed in a star-shapedconfiguration where the phenyl rings adopt an 'inverted' bowl-like structure with the BH group insideand the Mo(CO),(NO) group outside the bowl. The arrangement of the 4-benzyl groups with respectto the pyrazolyl rings and the H-B Mo three-fold axis is strongly reminiscent of an inverted threelegged'Isle of Man' symbol.
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