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• 153625-67-3 1,2-bis-[(2,6-diisopropylphenyl)imino]acenaphthene 

Relevant academic research and scientific papers

Divalent germanium compound with a radical-anionic ligand: Molecular structures of (dpp-BIAN)asterisk inside a circle sign-GeCl and its hydrochloration products (2) and (3) (see abstract). (dpp-BIAN = 1,2-bis{(2,6-diisopropylphenyl)imino}acenaphthene)

The germanium(II) compound (dpp-BIAN)GeCl (1), which contains the radical anion of dpp-BIAN can be prepared either by reacting free dpp-BIAN ligand with 2 equiv of GeCl2(1,4-dioxane) in Et2O or by metathetical reaction of the sodium salt of dpp-BIAN with germanium dichloride in Et 2O or benzene. The reaction of benzene solutions of 1 with 2 or 3 equiv of HCl led to protonation of the dpp-BIAN ligand affording [(dpp-BIAN)(H)2]asterisk inside a circle sign+[GeCl 3]- (2) and [{(dpp-BIAN)(H)2 asterisk inside a circle sign+}2(Cl-)] +[GeCl3]- (3), which incorporate the radical cation of the protonated ligand. Compounds 1-3 have been characterized by elemental analysis, IR, UV-vis, and electron spin resonance (ESR) spectroscopy. Molecular structures of 1-3 were determined by single-crystal X-ray diffraction. In molecule 1, the Ge atom is positioned at the apex of the slightly distorted trigonal pyramid. The Ge-N bond lengths in 1 are 2.0058(19) and 2.004(2) A. The molecular structure of 2 consists of contact ions [(dpp-BIAN)(H)2]+ and [GeCl3]-. In the molecular structure of 3, two radical cations of [(dpp-BIAN)(H) 2]+ are coordinated by the chlorine anion. The ESR signal of 1 indicates the presence of a dpp-BIAN radical anion and shows a hyperfine structure due to the coupling of an unpaired electron to 14N, 73Ge, 35Cl, 37Cl, and 1H nuclei (AN = 0.48 (2 N), AGe = 0.96, A Cl = 0.78 (35Cl), ACl = 0.65 (37Cl), AH = 0.11 (4 H) mT, g = 2.0014). Both 2 and 3 reveal ESR signals of radical cation [(dpp-BIAN)(H)2] asterisk inside a circle sign+ (septet, AN = 0.53, A H = 0.48 mT, g = 2.0031).