Calcium Complexes Having Different Amidinate Ligands - Synthesis and Structural Diversity

Anga, S and Bhattacharjee, J and Banerjee, I and Nayek, H P and Panda, Tarun K (2016) Calcium Complexes Having Different Amidinate Ligands - Synthesis and Structural Diversity. Chemistryselect, 1 (9). pp. 2014-2020. ISSN 2365-6549

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A one-pot reaction of α-diimine ligand 1,4-disubstituted diazabutadienes (DAD) with potassium benzyl and anhydrous calcium iodide in 1:1:1 molar ratio afforded unprecedented 3-phenylprop-2-ene-di-amido calcium compound [κ2-(THF)4Ca{DippNC(=CHPh)CH2NDipp}] (1) (Dipp = 2,6-diisopropylphenyl) in good yield. The solid-state structure of the compound 1 revealed the formation of dianionic 3-phenylprop-2-ene-di-amido ligand having an exocyclic olefinic bond derived from neutral α-diimine fragment. However, analogous reactions with three different carbodiimides (RN=C=NR; R=Cy, iPr and tBu) with alkyl potassium and anhydrous calcium diiodide yielded corresponding homoleptic calcium compounds with amidinato ligand [κ2-(THF)2Ca{RN=C(CH2Ph)NR}2] [R=Cy (2), iPr (3) and tBu (4)]. A separate reaction of DAD ligand, LiCH2SiMe3 and anhydrous ZnCl2 in diethylether solvent produced tri-coordinated zinc compound [κ2- {DippN=C(CH2SiMe3)CH2NDipp}Zn[κ1-{DippN=C(CH2SiMe3)CH2N-Dipp}] (5) having amidinato moieties in the zinc coordination sphere in high yield. Molecular structures of compounds 2–5 in their solid states were also established.

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IITH Creators:
IITH CreatorsORCiD
Panda, Tarun K
Item Type: Article
Additional Information: The instrumental facilities were provided by the Indian Institute of Technology Hyderabad (IITH). S. A. thanks CSIR, India and J.B. thanks UGC India for their PhD fellowship. Generous supports from Prof. Kazushi Mashi ma and Dr. Hayato Tsurugi of Osaka University, Japan are gratefully acknowledged.
Uncontrolled Keywords: Calcium;amidinate;1,4-diaza-butadiene;zinc;carbodiimides
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: Team Library
Date Deposited: 28 Jun 2016 04:38
Last Modified: 07 Sep 2017 10:48
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