Dongil Kim

Kyungpook National University

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Y. C. Park

Kyungpook National University

E. H. Kim

Kyungpook National University

Hyewon Jung

Korea Institute of Science and Technology

Hanne Bak

Regeneron (United States)

Senthilkumar Muthusamy

Sree Chitra Thirunal Institute for Medical Sciences and Technology

Benjamin Lindner

Boehringer Ingelheim (Germany)

Daeheum Cho

Massachusetts Institute of Technology

Moritz J. Schmidt

Boehringer Ingelheim (Germany)

Saira Nayab

University of Swabi

Kerstin Otte

University of Applied Sciences Biberach

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Boehringer Ingelheim (Germany)

Kyungpook National University

University of Applied Sciences Biberach

Biocat

Zhejiang University of Technology

John Wiley & Sons (United States)

RWTH Aachen University

Johns Hopkins University

Regeneron (United States)

Sree Chitra Thirunal Institute for Medical Sciences and Technology

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Asymmetric dibenzoylated monobenzotetraazacyclo[15]annulenenickel(II) complexes

Journal of Coordination Chemistry (2007)

E. H. Kim Dongil Kim I. J. Park Zun‐Ung Bae Jong Chul Byun

The 15-membered asymmetric complexes, 3,11-di(p-Xbenzoyl)-2,4,10,12-tetramethyl-1,5,9,13-monobenzotetraazacyclo[15]annulenenickel(II), X = CH3, H, Cl, NO2 and OCH3, were synthesized and characterized. IR spectra of the benzoylated complexes showed an intense C=O stretching mode in the range 1630–1640 cm−1. Hammett plots of of π → π* and LMCT were linear with slopes of +0.379 and +0.339, respectively. 1H NMR signals of methyl groups showed shielding effects due to magnetic anisotropy of benzoyl groups, while other proton signals exhibited deshielding effects. 13C NMR spectra were consistent with 1H NMR. Voltammograms of complexes showed two irreversible oxidation peaks due to the ligands in the ranges +0.35 to +0.44 V and +0.74 to +0.86 V, respectively. A reduction wave involving nickel(II) was found in the range −2.50 to −2.70 V, depending on substituents on the benzoyl group. Hammett plots of the first and second oxidation potentials had linear slopes of +0.071 and +0.104, respectively. The structures of 2,4,10,12-tetramethyl-1,5,9, 13-monobenzotetraazacyclo[15]annulenenickel(II) (monoclinic, C2/c, a = 22.883(6), b = 10.358(3), c = 14.755(4) Å, β = 102.704(4)°, Z = 8, R1 [I > 2σ(I)] = 0.0295, wR 2 [I > 2σ(I)] = 0.0744) and 3,11-di(p-methylbenzoyl)-2,4,10,12-tetramethyl-1,5,9,13-monobenzotetraazacyclo[15]annulenenickel(II) (orthorhombic, Pca21, a = 27.829(3), b = 10.3904(11), c = 10.4664(11) Å, Z = 4, R 1 [I > 2σ(I)] = 0.0387, wR 2 [I > 2σ(I)] = 0.0840) were determined using single-crystal X-ray methods.

Orthorhombic crystal system

Monoclinic crystal system

Proton NMR

10.1080/00958970600794875

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Highly active cobalt(II) and copper(II) complexes supported by aminomethylquinoline mediating stereoselective ring‐opening polymerization of rac‐lactide

Bulletin of the Korean Chemical Society (2024)

J. S. Lee Saira Nayab Ameet Kumar Dongil Kim Hyewon Jung

Abstract Cobalt(II) and copper(II) complexes supported by 4‐(quinolin‐2‐ylmethyl)morpholine (L) were characterized, and their reactivity toward the ring‐opening polymerization (ROP) of rac ‐lactide ( rac ‐LA) was studied. The use of [LMCl 2 ]/LiO i Pr and [LMCl 2 ]/LiMe (M = Co, Cu) resulted in over 95% conversion within 10 min at 25 °C. The effect of the initiating group and geometry of the metal complexes steered the heterotactic enchainment of the resultant polylactide(PLA). The Co(II)/LiMe system represents the first example of the ROP of rac ‐LA with high heterotactic enchainment ( P r = 0.92) with 98% conversion at 0 °C.

Lactide

Reactivity

10.1002/bkcs.12828

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Synthesis of Some Octahedral Nickel(II) Complexes of One Isomer of Isomeric Me8[14]anes: X-ray Structure of Diisothiocyanato(3,10-C-meso-3,5,7,7,10,12,14,14-octamethyl-1,4,8,11-tetraazacyclotetradecane, LC)nickel(II), [NiLC(NCS)2]

Journal of inclusion phenomena and molecular recognition in chemistry (2006)

Tapashi G. Roy S.K.S. Hazari Benu K. Dey Ashish Kumar Nath Dongil Kim

Triclinic crystal system

Octahedral molecular geometry

10.1007/s10847-006-9150-x

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Citations (18)

ChemInform Abstract: Rhodium‐Catalyzed Reaction of Formylbenzoyldiazomethane with Thiophene Derivatives.

ChemInform (1996)

H.‐S. Kim S. H. Kim Dongil Kim

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

10.1002/chin.199649132

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Biotechnology and Bioengineering: Volume 119, Number 3, March 2022

Biotechnology and Bioengineering (2022)

Aditi Sammi Supratim Divya Rahul Mahapatra Pranjal Kumar Brian James Kirsch

10.1002/bit.27825

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