Abstract
Further development of the reagent 1,5-diphenylcarbazone (1) with regard to higher sensitivity and better selectivity requires the knowledge of the constitution of the chelates. For this purpose 1-methyl-1,5-diphenylcarbazonato—diphenylboron was synthesized, which can only be formed from the enol-form of the so far unknown unsymmetrical 1-methyl-1,5-diphenyl-carbazone6. From the various compounds which contain the hydrazo part of 1,5-diphenylcarbazone (1). only picolinic acid phenylhydrazide14 forms a boron chelate, from which it can be concluded that the boron atom is coordinated to the N-5 of the azo group (formula5).
Similar content being viewed by others
Literatur
B. Friese undF. Umland, Reindarstellung des 1,5-Diphenylcarbazonatodiphenylbor-chelates und Konstitutionsvorschlag auf Grund seiner Spektren. Anal. Chim. Acta96, 303–310 (1978).
P. Krumholz undE. Krumholz, Mh. Chem.70, 431 (1937).
B. Friese undF. Umland, Z. Anal. Chem.286, 107 (1977).
B. Friese, Dissertation, Univ. Münster, 1975.
K. H. Slotta undK. R. Jacobi, Z. Anal. Chem.77, 344 (1929).
M. Laing, P. Sommerville undP. A. Alsop, J. Chem. Soc.A 1971, 1247.
H. Meyer undJ. Mally, Mh. Chem.33, 393 (1912).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Friese, B., Umland, F. Zur Konstitution des 1,5-Diphenylcarbazonato—Diphenylbor-Chelates — ein chemischer Beweis. Monatshefte für Chemie 109, 711–718 (1978). https://doi.org/10.1007/BF00912787
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00912787