Cadmium(II) complexes containing N′-substituted N,N-bispyrazolyl ligands: The formation of 4- and 5-coordinated monomers versus 6-coordinated dimer

Sunghye Choi; Sunghoon Kim; Ha Jin Lee; Hyosun Lee

doi:10.1016/j.inoche.2014.03.027

Cadmium(II) complexes containing N′-substituted N,N-bispyrazolyl ligands: The formation of 4- and 5-coordinated monomers versus 6-coordinated dimer

Sunghye Choi, Sunghoon Kim, Ha Jin Lee, Hyosun Lee

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

10 Scopus citations

Abstract

Novel Cd(II) bromide complexes [L_aCdBr₂], [L _bCdBr₂] and [L_cCd(μ-Br)Br]₂ have been synthesized and characterized. [L_aCdBr₂] and [L _bCdBr₂] were distorted tetrahedral and trigonal bipyramidal geometry around metal, respectively, depending on the coordination of the nitrogen atom of N′-substituted amine moiety and the cadmium center. However, [L_cCd(μ-Br)Br]₂ reveals a bromo-bridged 6-coordinated dimeric species. Specifically, the catalytic activity of [L_bCdBr₂] (1.13 × 10⁵ g PMMA/mol Cd·h) in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) at 60 °C was higher than that of [L_aCdBr₂] (5.03 × 10⁴ g PMMA/mol Cd·h) and reference complex [CdCl₂] (3.53 × 10 ⁴ g PMMA/mol Cd·h).

Original language	English
Pages (from-to)	164-168
Number of pages	5
Journal	Inorganic Chemistry Communications
Volume	44
DOIs	https://doi.org/10.1016/j.inoche.2014.03.027
State	Published - Jun 2014

Keywords

Bispyrazolyl
Dimeric Cd(II) complex
Methyl methacrylate polymerization
Syndiotacticity

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@article{b3bdb84380e44360921c69eaeefd4884,

title = "Cadmium(II) complexes containing N′-substituted N,N-bispyrazolyl ligands: The formation of 4- and 5-coordinated monomers versus 6-coordinated dimer",

abstract = "Novel Cd(II) bromide complexes [LaCdBr2], [L bCdBr2] and [LcCd(μ-Br)Br]2 have been synthesized and characterized. [LaCdBr2] and [L bCdBr2] were distorted tetrahedral and trigonal bipyramidal geometry around metal, respectively, depending on the coordination of the nitrogen atom of N′-substituted amine moiety and the cadmium center. However, [LcCd(μ-Br)Br]2 reveals a bromo-bridged 6-coordinated dimeric species. Specifically, the catalytic activity of [LbCdBr2] (1.13 × 105 g PMMA/mol Cd·h) in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) at 60 °C was higher than that of [LaCdBr2] (5.03 × 104 g PMMA/mol Cd·h) and reference complex [CdCl2] (3.53 × 10 4 g PMMA/mol Cd·h).",

keywords = "Bispyrazolyl, Dimeric Cd(II) complex, Methyl methacrylate polymerization, Syndiotacticity",

author = "Sunghye Choi and Sunghoon Kim and Lee, {Ha Jin} and Hyosun Lee",

year = "2014",

month = jun,

doi = "10.1016/j.inoche.2014.03.027",

language = "English",

volume = "44",

pages = "164--168",

journal = "Inorganic Chemistry Communications",

issn = "1387-7003",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Cadmium(II) complexes containing N′-substituted N,N-bispyrazolyl ligands

T2 - The formation of 4- and 5-coordinated monomers versus 6-coordinated dimer

AU - Choi, Sunghye

AU - Kim, Sunghoon

AU - Lee, Ha Jin

AU - Lee, Hyosun

PY - 2014/6

Y1 - 2014/6

N2 - Novel Cd(II) bromide complexes [LaCdBr2], [L bCdBr2] and [LcCd(μ-Br)Br]2 have been synthesized and characterized. [LaCdBr2] and [L bCdBr2] were distorted tetrahedral and trigonal bipyramidal geometry around metal, respectively, depending on the coordination of the nitrogen atom of N′-substituted amine moiety and the cadmium center. However, [LcCd(μ-Br)Br]2 reveals a bromo-bridged 6-coordinated dimeric species. Specifically, the catalytic activity of [LbCdBr2] (1.13 × 105 g PMMA/mol Cd·h) in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) at 60 °C was higher than that of [LaCdBr2] (5.03 × 104 g PMMA/mol Cd·h) and reference complex [CdCl2] (3.53 × 10 4 g PMMA/mol Cd·h).

AB - Novel Cd(II) bromide complexes [LaCdBr2], [L bCdBr2] and [LcCd(μ-Br)Br]2 have been synthesized and characterized. [LaCdBr2] and [L bCdBr2] were distorted tetrahedral and trigonal bipyramidal geometry around metal, respectively, depending on the coordination of the nitrogen atom of N′-substituted amine moiety and the cadmium center. However, [LcCd(μ-Br)Br]2 reveals a bromo-bridged 6-coordinated dimeric species. Specifically, the catalytic activity of [LbCdBr2] (1.13 × 105 g PMMA/mol Cd·h) in the polymerization of methyl methacrylate (MMA) in the presence of modified methylaluminoxane (MMAO) at 60 °C was higher than that of [LaCdBr2] (5.03 × 104 g PMMA/mol Cd·h) and reference complex [CdCl2] (3.53 × 10 4 g PMMA/mol Cd·h).

KW - Bispyrazolyl

KW - Dimeric Cd(II) complex

KW - Methyl methacrylate polymerization

KW - Syndiotacticity

UR - http://www.scopus.com/inward/record.url?scp=84898641507&partnerID=8YFLogxK

U2 - 10.1016/j.inoche.2014.03.027

DO - 10.1016/j.inoche.2014.03.027

M3 - Article

AN - SCOPUS:84898641507

SN - 1387-7003

VL - 44

SP - 164

EP - 168

JO - Inorganic Chemistry Communications

JF - Inorganic Chemistry Communications

ER -

Cadmium(II) complexes containing N′-substituted N,N-bispyrazolyl ligands: The formation of 4- and 5-coordinated monomers versus 6-coordinated dimer

Abstract

Keywords

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