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Herein we report the synthesis of two new organic compounds, diisobutyl- and   diisopentyl   N,N′-methylene-(S,S)-ethylenediamine-N,N′-di-2-(3-cyclohexyl)propanoate. A   one-pot procedure was carried out by adding the reducing agent and carbonyl   compound into the methanol solution of the parent compounds (iso-butyl and   iso-pentyl esters of (S,S)-ethylenediamine-N,N′-di-2-(3-cyclohexyl)propanoic   acid) in appropriate stoichiometric ratios. The compounds were fully   characterized by infrared, ESI-MS, 1D (1H, 13C) and 2D (COSY, HSQC, HMBC) NMR   spectroscopy and elemental analysis. The spectral data confirm the presence   of -CH2- group introduced between nitrogen atoms of the ethylenediamine   moiety revealing neutral form of potential bidentate ligand. [Projekat   Ministarstva nauke Republike Srbije, br. 172035. The authors also acknowledge   the support of the FP7 RegPot project FCUB ERA GA No. 256716. The EC does not   share responsibility for the content of the article

Novel methylene bridged ethylenediamine-type ligands: Synthesis and spectral characterization