Journalartikel

Autorenliste: Li, XW; Xie, Y; Schreiner, PR; Gripper, KD; Crittendon, RC; Campana, CF; Schaefer, HF; Robinson, GH

Jahr der Veröffentlichung: 1996

Seiten: 3798-3803

Zeitschrift: Organometallics

Bandnummer: 15

Heftnummer: 18

DOI Link: https://doi.org/10.1021/om9605084

Verlag: American Chemical Society

Abstract: 

The cyclogallane dipotassium tris((2,6-dimesitylphenyl)cyclogallene), K₂[(Mes₂C₆H₃)Ga]₃ (Mes = 2,4,6-Me₃C₆H₂), has been prepared by either of two distinct synthetic routes. Disproportionation of gallium(II) chloride, Ga₂Cl₄, in the presence of (2,6-dimesitylphenyl)lithium, (Mes₂C₆H₃)Li, followed by potassium metal reduction in Et₂O affords the title compound as large ruby red crystals. Alternatively, K₂[(Mes₂C₆H₃)Ga]₃ may readily be approached by direct alkali metal reduction of (Mes₂C₆H₃)GaCl₂. The title compound was characterized by ¹H and ¹³C NMR, elemental analyses, IR spectroscopy, and single-crystal X-ray diffraction. The cyclogallane resides about the planar Ga₃ triangle constituted by extremely short Ga−Ga bonds:  2.4260(5), 2.4317(5), and 2.4187(5) Å. Theoretical examination of the Ga₃^2- anionic core in [GaH]₃^2-, Na₂[GaH]₃, and K₂[GaH]₃ suggests a well-defined π-molecular orbital. Both experimental and theoretical results strongly support the cyclogallene dianion, [(Mes₂C₆H₃)Ga]₃^2-, as a well-defined metalloaromatic systema metallic ring system exhibiting aromatic behavior.

Harvard-Zitierstil: Li, X., Xie, Y., Schreiner, P., Gripper, K., Crittendon, R., Campana, C., et al. (1996) Cyclogallanes and Metalloaromaticity. Synthesis and Molecular Structure of Dipotassium Tris((2,6-dimesitylphenyl)cyclogallene), K2[(Mes2C6H3)Ga]3 (Mes = 2,4,6-Me3C6H2):  A Structural and Theoretical Examination, Organometallics, 15(18), pp. 3798-3803. https://doi.org/10.1021/om9605084

APA-Zitierstil: Li, X., Xie, Y., Schreiner, P., Gripper, K., Crittendon, R., Campana, C., Schaefer, H., & Robinson, G. (1996). Cyclogallanes and Metalloaromaticity. Synthesis and Molecular Structure of Dipotassium Tris((2,6-dimesitylphenyl)cyclogallene), K2[(Mes2C6H3)Ga]3 (Mes = 2,4,6-Me3C6H2):  A Structural and Theoretical Examination. Organometallics. 15(18), 3798-3803. https://doi.org/10.1021/om9605084