Preparation and Crystal Structures of Chiral and Non-chiral Mixed Ligand Copper Complexes Containing N-methyl Imidazole and Various N-phthaloylalanines PDF Download
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Author: Hiral Patel
Publisher:
ISBN:
Category : Chirality
Languages : en
Pages : 0
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Book Description
Author: Hiral Patel
Publisher:
ISBN:
Category : Chirality
Languages : en
Pages : 0
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Author: Emily Catherine Chong
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages :
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A quasiracemate is the cocrystallization of two similarly shaped but chemically distinct molecules of opposite handedness. There has been limited to no work regarding quasiracemates in the field of inorganic chemistry. The goal of this study was to prepare various metal based enantiomers, racemates, and quasiracemates using N-benzoylalanines with imidazole or N-methylimidazole as ligands bound to copper to form a metal complex. In this study, we developed a method to prepare substituted N-benzoylalanines and its copper complexes. We also prepared one co-crystal between two differently substituted N-benzoylalanines. This work reports the successful synthesis and crystal structure analysis of an organic quasiracemate, (D-4-nitro-N-benzoylalanine)(L-4-methyl-N-benzoylalanine), an inorganic quasiracemate, bis(N-methylimidazole)(D-4-nitro-N-benzoylalanine)(L-4- methyl-N-benzoylalanine)copper(TT), and a racemate bis(N-methylimidazole)bis(D,L-4-nitro-N-benzoylalanine)copper(TT).
Author: Mohit Singhal
Publisher:
ISBN:
Category : Enantiomers
Languages : en
Pages : 164
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Author: Molly A. O'Connor
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 812
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Book Description
Bidentate, tetradentate, and hexadentate ligands, with N2, N4, and S2N4 donor sets were complexed with Cu(II) and Ni(II) to form chiral and achiral chelates in an attempt to prepare complexes that allowed for the access of multiple oxidation states through electrochemical methods. The bidentate ligands were prepared from pyrrole-2-carboxaldehyde and chiral and achiral amines and anilines, and were complexed with the desired metal in a 2:1 ratio, with chiral ligands resulting in chiral complexes. Analogous ligands with N4 coordination spheres were also prepared using pyrrole-2-carboxaldyhyde and various diamines, and were complexed in a 1:1 fashion. The tetradentate ligands were prepared using vinylpyridine and chiral piperazine derivatives to form both enantiomers of the chiral complexes, as well as similar non-chiral mono and dinuclear complexes using achiral derivatives of piperazine and homopiperazine. The hexadentate ligands were synthesized from 2-hydrazinopyridine and alkyl and aryl bridged dithio-diketo precursors, which were prepared using either a N,N,N-triethyl-N-(propan-2-onyl)ammonium or N,N,N-triethyl-N-(phenylethan-2-onyl)ammonium chloride salt and a range of dithiols. Synthetic, crystallographic, and absorption data will be presented as well as circular dichroism (CD) data for the chiral complexes and magnetic data for the dinuclear complex. Complexes were also characterized using electrochemistry and ESR.
