What is Gomberg-Bachmann reaction?
The Gomberg-Bachmann reaction involves the formation of diaryl compounds from aryl diazonium salts and aromatic compounds, and the reaction is dependent on the presence of alkali.

References
M. Gomberg, W.E. Bachmann, “The Synthesis of Biaryl Compounds by Means of the Diazo Reaction” Journal of the American Chemical Society 46, 2339 (1924)
Full Professor of Organic Chemistry at the University of Granada, with a long-standing research career in Computational Chemistry and molecular modeling and design.