Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2)

Pott T, Jutzi P, Neumann B, Stammler H-G (2001)
ORGANOMETALLICS 20(10): 1965-1967.

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Abstract
The heterocycles [([eta (1)-Cp*)GaN(Dipp)CH=CHN(Dipp)] (1) and [(eta (1)-Cp*)GaN(Dep)CH= CHN(Dep)] (2) were obtained by oxidative addition of (eta (5)-pentamethylcyclopentadienyl)gallium(I) (Cp*Ga) to Dipp-DAB (1,4-bis(2,6-diisopropylphenyl)-1,4-diazabuta-1,3-diene) and Dep-DAB (1,4-bis(2,6-diethylphenyl)-1,6diazabuta-1,3-diene), respectively. Compounds 1 and 2 are the first examples of monomeric gallium-containing heterocycles of the diazabutadiene (DAB) type. 1 was structurally characterized by X-ray crystallography. In contrast, the reaction of Cp*Ga with But-DAB (1,4-di-tert-butyl-1,4-diazabuta-1,3-diene) led to the formation of the known radical (Ga[Bu-t-DAB](2)) (3) in high yield, thus providing an alternative synthesis to the cocondensation technique used previously. Radical 3 was further characterized by H-1 NMR spectroscopy and cyclic voltammetric studies, which revealed two reversible oxidation steps and one reversible reduction step.
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Pott T, Jutzi P, Neumann B, Stammler H-G. Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2). ORGANOMETALLICS. 2001;20(10):1965-1967.
Pott, T., Jutzi, P., Neumann, B., & Stammler, H. - G. (2001). Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2). ORGANOMETALLICS, 20(10), 1965-1967.
Pott, T., Jutzi, P., Neumann, B., and Stammler, H. - G. (2001). Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2). ORGANOMETALLICS 20, 1965-1967.
Pott, T., et al., 2001. Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2). ORGANOMETALLICS, 20(10), p 1965-1967.
T. Pott, et al., “Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2)”, ORGANOMETALLICS, vol. 20, 2001, pp. 1965-1967.
Pott, T., Jutzi, P., Neumann, B., Stammler, H.-G.: Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2). ORGANOMETALLICS. 20, 1965-1967 (2001).
Pott, T, Jutzi, Peter, Neumann, B, and Stammler, Hans-Georg. “Differing reactivities of Cp*Ga toward diazabutadienes: Synthesis of novel 1-galla-2,5-diazoles and of the known radical Ga[Bu-t-DAB](2)”. ORGANOMETALLICS 20.10 (2001): 1965-1967.
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