The Coordination Chemistry of Pyrazole‐Derived Ligands

Trofimenko, Swiatoslaw

doi:10.1002/9780470166352.ch3

Cited by 660 publications

(41 citation statements)

References 636 publications

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“…Crystals suitable for X-ray were obtained from mother liquid after 5 d. Yield: 0.37 g, 85% (based on V) Anal. calcd for C 12 (ii) Synthesis of V 2 O 2 (μ-pz)(μ-OOSO 2 )(μ-OCH 3 ) (pz) 4 (2).…”

Section: Synthesis Of Complexesmentioning

confidence: 99%

“…All H-atoms in the structures of 1 and 2 were refined isotropically and the contributions of the hydrogen atoms were included in calculated positions. Crystallographic parameters for 1: orthorhombic, space group Pna2 1 , a=14.547 (2) …”

Section: X-ray Data Collection and Refinement Of Crystal Structurementioning

confidence: 99%

“…The pyrazole complexes of vanadium are rare, only in 1983, Larkworthy et al [26] synthesized the vanadium complexes of V(pz) 4 Cl 2 , V(pz) 4 Br 2 and V(pz) 6 Cl 2 , and the information of synthesis and spectra were given, and in 1989, Kime-Hunt et al [5] reported crystal structure of [(Me 2 pz) 2 VOCl 2 ] 2 ·THF, etc. In this paper, we report two new oxovanadium complexes possessing pyrazole ligand VO(pz) 4 (SO 4 )·H 2 O (1) and V 2 O 2 (μ-pz)(μ-c OOSO 2 )(μ-OCH 3 )(pz) 4 (2). Complex 1 is a mono-nuclear neutral complex, while complex 2 is a binuclear complex connected by mixing bridges of pyrazolate, sulphate and methoxy.…”

mentioning

confidence: 98%

“…Coordination chemistry of pyrazole-base ligands has been extensively studied since the poly(pyrazole)borate was invented by Trofimenko in 1966 [1][2][3][4] . A variety of bidentate or multidentate pyrazole-derived ligands have been employed in coordination chemistry and organometallic chemistry.…”

mentioning

confidence: 99%

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Synthesis and characterization of two new types of oxovanadium complexes with pyrazole as ligand

Zhang

et al. 2006

CHINESE SCI BULL

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At room temperature, two new different oxovanadium complexes with simple pyrazole (C 3 H 4 N 2 ) as ligand were synthesized. VO(pz) 4 (SO 4 )⋅ H 2 O (1) (pz: pyrazole) is a mono-nuclear oxovanadium complex with pyrazole as terminal ligands. V 2 O 2 (μ-pz)(μ-OOSO 2 )(μ-OCH 3 )(pz) 4 (2) is bi-nuclear oxovanadium complex containing three different bridges, which are pyrazolate, sulphate and methoxy, respectively. The two complexes were characterized by IR, elemental analyses, thermal analyses and X-ray diffraction. The crystal structural data of the complexes 1 and 2 are given as follows: Complex 1, orthorhombic, Pna2 1 , a = 14.547 (2) Å, b =10.895(2) Å, c =11.835(2) Å; α=β=γ=90°, V=1875.8(5) Å 3 , Z = 4, R 1 = 0.0485, W R 2 = 0.1092. Complex 2, triclinic, P1 , a =8.377(2) Å, b =9.928(2) Å, c = 16.527(3) Å, α = 85.54(3)°, β = 80.92(3)°, γ = 87.92(3)°, R 1 = 0.1461, W R 2 = 0.4444. The study of non-thermal kinetic decomposition shows that, for complex 1, the possible reaction mechanisms of the two steps are nucleation and growth n=1/3, and three-dimensional pervasion n=2, respectively, and the kinetic equations may be expressed as dα/dT = (A/β)exp(−E/RT){1/3(1−α) [−In(1−α)] −2 } and dα/dT = (A/β)exp(−E/RT){3/2(1−α) 2/3 [1−(1−α) 1/3 ] −1 }, respectively; for complex 2, the possible reaction mechanisms of the two steps are chemical reaction, and three-dimensional pervasion n=2, respectively; the kinetic equations may be expressed as dα/dT = (A/β)exp(−E/RT)[(1−α) 2 ], and dα/dT = (A/β)exp(−E/RT){3/2(1−α) 2/3 [1−(1−α) 1/3 ] −1 }, respectively.

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Section: Synthesis Of Complexesmentioning

confidence: 99%

Section: X-ray Data Collection and Refinement Of Crystal Structurementioning

confidence: 99%

mentioning

confidence: 98%

mentioning

confidence: 99%

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Synthesis and characterization of two new types of oxovanadium complexes with pyrazole as ligand

Zhang

et al. 2006

CHINESE SCI BULL

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“…Like the major nutrients, nitrate and phosphate, cadmium is depleted from surface waters, increases with depth and reached a fairly constant concentration in deep waters [3]. Many studies have been done on the biological role of cadmium metal where other metals in the biological species were replaced by cadmium [4][5][6].In this regard, hydrotris(pyrazolyl)borate (Tpy) ligands have been studied extensively in modeling the active site of various metal containing proteins [7]. But, till now there is no report of cadmium based hydroxo complex with the Tpy family of ligands.…”

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confidence: 99%

Synthesis, crystal structure and hydrolytic activity of a trispyrazolyl borato cadmium hydroxo complex

Tomar

2015

Inorganic Chemistry Communications

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Synthesis of the First Lanthanoid(II) Pyrazolate Complex by Redox Transmetallation from Thallium and Mercury Reagents

Deacon¹,

Delbridge

Skelton

et al. 1998

Eur. J. Inorg. Chem.

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The Coordination Chemistry of Pyrazole‐Derived Ligands

Cited by 660 publications

References 636 publications

Synthesis and characterization of two new types of oxovanadium complexes with pyrazole as ligand

Synthesis and characterization of two new types of oxovanadium complexes with pyrazole as ligand

Synthesis, crystal structure and hydrolytic activity of a trispyrazolyl borato cadmium hydroxo complex

Synthesis of the First Lanthanoid(II) Pyrazolate Complex by Redox Transmetallation from Thallium and Mercury Reagents

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