Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]

Jana S, Frohlich R, Mitzel NW (2006)
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 61(7): 838-845.

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Abstract
The reaction of dialkylzinc compounds R2Zn (R = Me, Et) with N,N-dimethylhydrazine and trimethylsilanol in a 4: 2: 2 ratio leads to the formation of tetra(alkylzinc) tris-siloxide mono-hydrazide aggregates, [(RZn)(4)(NHNMe2)(OSiMe3)(3)] [R = Me (1) and Et (2)]. These compounds are aggregates of mirror symmetry, containing the novel Zn4N2O3 core. Both compounds have been characterised by H-1, C-13 and Si-29 NMR and IR spectroscopy, by mass spectrometry and by elemental analysis, and 2 also by X-ray crystallography. The structure can be derived from a heterocubane, in which one anionic vertex is replaced by an NHNMe2 group contributing two N atoms to the core constitution. By applying a ratio of hydrazine: silanol of 2: 1 in a reaction with R2Zn (R = Me, Et, iPr), compounds of the general formula [(RZn)(4)(NHNMe2)(2)(OSiMe3)(2)] [R = Me (3), Et (4), iPr (5)] are obtained. These aggregates contain a Zn4N4O2 core. Upon employing a hydrazine: silanol ratio of 5: 1 in a reaction with diisopropyl zinc, the compound [(iPrZn)(4)(NHNMe2)(3)(OSiMe3)] results, containing a Zn4N6O unit. Compounds 3-6 have been characterised by H-1, C-13 and Si-29 NMR and IR spectroscopy, by mass spectrometry and by elemental analysis. The topologic relationship between the pure hydrazides [(RZn)(4)(NHNMe2)(4)], the mixed aggregates [(RZn)(4)(NHNMe2)(3)(OR')], [(RZn)(4)(NHNMe2)(2)(OR')(2)] and [(RZn)(4)(NHNMe2)(3)(OR')(3)] and the pure alkoxides [(R-Zn)(4)(OR')(4)] is discussed.
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Jana S, Frohlich R, Mitzel NW. Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES. 2006;61(7):838-845.
Jana, S., Frohlich, R., & Mitzel, N. W. (2006). Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 61(7), 838-845.
Jana, S., Frohlich, R., and Mitzel, N. W. (2006). Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 61, 838-845.
Jana, S., Frohlich, R., & Mitzel, N.W., 2006. Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, 61(7), p 838-845.
S. Jana, R. Frohlich, and N.W. Mitzel, “Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]”, ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES, vol. 61, 2006, pp. 838-845.
Jana, S., Frohlich, R., Mitzel, N.W.: Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES. 61, 838-845 (2006).
Jana, Surajit, Frohlich, Roland, and Mitzel, Norbert W. “Organozinc siloxide-hydrazide aggregates [(RZn)(4)(NHNMe2)(x)(OSiMe3)((4-x))]”. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 61.7 (2006): 838-845.
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