Synthesis, characterization, and MMA polymerization activity of tetrahedral Co (II) complex bearing N, N-bis(1-pyrazolyl)methyl ligand based on aniline moiety

Minkyu Yang; Won Jin Park; Keun Byoung Yoon; Jong Hwa Jeong; Hyosun Lee

doi:10.1016/j.inoche.2010.10.019

Synthesis, characterization, and MMA polymerization activity of tetrahedral Co (II) complex bearing N, N-bis(1-pyrazolyl)methyl ligand based on aniline moiety

Minkyu Yang
, Won Jin Park
, Keun Byoung Yoon
, Jong Hwa Jeong
, Hyosun Lee

Kyungpook National University

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

A new series of air-stable Co(II) complexes, [bpmaL1]CoCl₂ (1a), [bpmaL2]CoCl₂ (2a), [bpmaL3]CoCl₂ (3a), and [bpmaL4]CoCl₂ (4a), where, for example, [bpmaL1 = N,N-bis{(1-pyrazolyl)methyl}aniline], has been synthesized. X-ray crystallography of 2a indicated that it has a dipper-type structure in which the aniline moiety plays the role of the handle with a tetrahedral cobalt located at the edge with an eight-membered chelate ring formation. However, there is no indication that the metal is coordinated to the nitrogen of the aniline group. Moreover, complexes showed the highest catalytic activity in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 1.14 × 10⁶ g PMMA/mol-Co•h at 60 °C and syndiotacticity of PMMA, characterized by ¹³ C NMR spectroscopy, which value was ca. 0.57.

Original language	English
Pages (from-to)	189-193
Number of pages	5
Journal	Inorganic Chemistry Communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1016/j.inoche.2010.10.019
State	Published - Jan 2011

Keywords

Methyl methacrylate
N-N-bis(1-H-Pyrazole-1-yl)
PMMA
Tetrahedral Co (II) complex

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10.1016/j.inoche.2010.10.019

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@article{6601ee6b00404bc9a108cf5dcf712032,

title = "Synthesis, characterization, and MMA polymerization activity of tetrahedral Co (II) complex bearing N, N-bis(1-pyrazolyl)methyl ligand based on aniline moiety",

abstract = "A new series of air-stable Co(II) complexes, [bpmaL1]CoCl2 (1a), [bpmaL2]CoCl2 (2a), [bpmaL3]CoCl2 (3a), and [bpmaL4]CoCl2 (4a), where, for example, [bpmaL1 = N,N-bis\{(1-pyrazolyl)methyl\}aniline], has been synthesized. X-ray crystallography of 2a indicated that it has a dipper-type structure in which the aniline moiety plays the role of the handle with a tetrahedral cobalt located at the edge with an eight-membered chelate ring formation. However, there is no indication that the metal is coordinated to the nitrogen of the aniline group. Moreover, complexes showed the highest catalytic activity in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 1.14 × 106 g PMMA/mol-Co•h at 60 °C and syndiotacticity of PMMA, characterized by 13 C NMR spectroscopy, which value was ca. 0.57.",

keywords = "Methyl methacrylate, N-N-bis(1-H-Pyrazole-1-yl), PMMA, Tetrahedral Co (II) complex",

author = "Minkyu Yang and Park, \{Won Jin\} and Yoon, \{Keun Byoung\} and Jeong, \{Jong Hwa\} and Hyosun Lee",

year = "2011",

month = jan,

doi = "10.1016/j.inoche.2010.10.019",

language = "English",

volume = "14",

pages = "189--193",

journal = "Inorganic Chemistry Communications",

issn = "1387-7003",

publisher = "Elsevier B.V.",

number = "1",

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TY - JOUR

T1 - Synthesis, characterization, and MMA polymerization activity of tetrahedral Co (II) complex bearing N, N-bis(1-pyrazolyl)methyl ligand based on aniline moiety

AU - Yang, Minkyu

AU - Park, Won Jin

AU - Yoon, Keun Byoung

AU - Jeong, Jong Hwa

AU - Lee, Hyosun

PY - 2011/1

Y1 - 2011/1

N2 - A new series of air-stable Co(II) complexes, [bpmaL1]CoCl2 (1a), [bpmaL2]CoCl2 (2a), [bpmaL3]CoCl2 (3a), and [bpmaL4]CoCl2 (4a), where, for example, [bpmaL1 = N,N-bis{(1-pyrazolyl)methyl}aniline], has been synthesized. X-ray crystallography of 2a indicated that it has a dipper-type structure in which the aniline moiety plays the role of the handle with a tetrahedral cobalt located at the edge with an eight-membered chelate ring formation. However, there is no indication that the metal is coordinated to the nitrogen of the aniline group. Moreover, complexes showed the highest catalytic activity in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 1.14 × 106 g PMMA/mol-Co•h at 60 °C and syndiotacticity of PMMA, characterized by 13 C NMR spectroscopy, which value was ca. 0.57.

AB - A new series of air-stable Co(II) complexes, [bpmaL1]CoCl2 (1a), [bpmaL2]CoCl2 (2a), [bpmaL3]CoCl2 (3a), and [bpmaL4]CoCl2 (4a), where, for example, [bpmaL1 = N,N-bis{(1-pyrazolyl)methyl}aniline], has been synthesized. X-ray crystallography of 2a indicated that it has a dipper-type structure in which the aniline moiety plays the role of the handle with a tetrahedral cobalt located at the edge with an eight-membered chelate ring formation. However, there is no indication that the metal is coordinated to the nitrogen of the aniline group. Moreover, complexes showed the highest catalytic activity in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) with an activity of 1.14 × 106 g PMMA/mol-Co•h at 60 °C and syndiotacticity of PMMA, characterized by 13 C NMR spectroscopy, which value was ca. 0.57.

KW - Methyl methacrylate

KW - N-N-bis(1-H-Pyrazole-1-yl)

KW - PMMA

KW - Tetrahedral Co (II) complex

UR - https://www.scopus.com/pages/publications/78651342304

U2 - 10.1016/j.inoche.2010.10.019

DO - 10.1016/j.inoche.2010.10.019

M3 - Article

AN - SCOPUS:78651342304

SN - 1387-7003

VL - 14

SP - 189

EP - 193

JO - Inorganic Chemistry Communications

JF - Inorganic Chemistry Communications

IS - 1

ER -

Synthesis, characterization, and MMA polymerization activity of tetrahedral Co (II) complex bearing N, N-bis(1-pyrazolyl)methyl ligand based on aniline moiety

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