Synthesis, reactions and structure of a hydroxo-bridged dinuclear Zn(II) complex: modeling the hydrolytic zinc enzymes

Gultneh, Yilma; Allwar,; Ahvazi, Bijan; Blaise, Die; Butcher, Ray J.; Jasinski, John M.; Jasinski, Jerry P.

doi:10.1016/0020-1693(95)04791-3

Cited by 32 publications

(14 citation statements)

References 26 publications

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“…There is only one previous structural study of a bispicen derivative of Zn (Parajó n-Costa et al, 2013). This study is in continuation of our past studies on the role of zinc in hydrolytic enzymes (Gultneh et al, 1996(Gultneh et al, , 1999, in particular the role of Zn in lowering the pK a of coordinated water molecules.…”

Section: Chemical Contextsupporting

confidence: 55%

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ⁴N,N′,N′′,N′′′]zinc(II) perchlorate

Okeke¹,

Gultneh²,

Butcher³

2017

Acta Cryst E

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Supporting information: this article has supporting information at journals.iucr.org/e The structure of the title compound, [Zn(C 14 H 18 N 4 )(C 2 H 3 N)(H 2 O)](ClO 4 ) 2 , contains a six-coordinate cation consisting of the tetradentate bispicen ligand, coordinated water, and coordinated acetonitrile, with the latter two ligands adopting a cis configuration. There are two formula units in the asymmetric unit. Both cations show almost identical structural features with the bispicen ligand adopting the more common cis-conformation. One of the four perchlorate anions is disordered over two positions, with occupancies of 0.9090 (15) and 0.0910 (15). There is extensive inter-ionic hydrogen bonding between the perchlorate anions and O-H and N-H groups in the cations, including a bifurcated hydrogen bond between an N-H group and two O atoms of one perchlorate anion. As a result of this extended hydrogen-bond network, the ions are linked into a complex three-dimensional array.

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Section: Chemical Contextsupporting

confidence: 55%

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ⁴N,N′,N′′,N′′′]zinc(II) perchlorate

Okeke¹,

Gultneh²,

Butcher³

2017

Acta Cryst E

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“…For example, carbonic anhydrase and carboxypeptidasewithazincatomasthe reactive center arevital to the processes of carbon dioxide regulation and digestion of proteins, respectively [2]. Zinc(II)chelate complexes have been studied as models for the active site of carbonic anhydrase and other hydrolytically active enzymes [3,4].The role of structural properties of zinc(II) in proteinfolding hasalsobeenextensively studied [5][6][7]. In addition, Schiff-base-zinc(II) complexes play an important role in enzymaticreactions andmolecular architecture [8,9].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of bis(3,5-dibromo-N-isopropylsalicylaldiminato- κ2N,O)zinc(II), Zn(C10H10Br2NO)2

Guo¹,

Shen²,

Cai³

2012

Zeitschrift Für Kristallographie - New Crystal Structures

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“…These compounds play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism and molecular architecture. Zinc(II) chelate complexes were studied as models for the active site of carbonic anhydrase and other hydrolytically active enzymes [5,6]. The role of zinc(II) structural properties in protein folding is also extensively studied [7][8][9][10].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of bis(3,5-dichloro-N-n-propylsalicylaldiminato- N,O)zinc(II), Zn(C10H10Cl2NO)2

Zhang¹,

Dong²,

Wang³

et al. 2011

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of material 3,5-Dichlorosalicylaldehyde (382 mg, 2m mol) and n-propylamine (118 mg, 2mmol) were dissolved in an aqueous ethanol solution (25 mL). The mixture was stirred at room temperature for 2htogive aclear yellow solution, which was added to amethanol solution (10 mL) of Zn(NO 3 ) 2 · 6H 2 O( 595 mg, 2m mol). The mixture was stirred for another 10 min at room temperature to give ayellow solution and then filtered. The yellow single crystals suitable for X-ray analysis were obtained by slowly evaporating the above filtrate at room temperature. The crystals were isolated and dried in avacuum desiccator containing anhydrous CaCl 2 (yield 68 %). Elemental analysis -found: C, 45.41 %; H, 3.90 %; N, 5.11 %; calculated for C 20H20ZnCl4N2O2:C,45.53 %; H, 3.82 %; N, 5.31 %. IR data are available in the CIF. Experimental detailsAll the Hatoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with d(C-H) = 0.93 -0.97 Å,and with U iso (H) =1.2 or 1.5 U eq (C). DiscussionTransition metal complexes of Schiff bases have been extensively investigated for many years due to their novel structures and potential applications in many fields [1][2][3][4]. These compounds play an important role in the development of coordination chemistry related to catalysis and enzymatic reactions, magnetism and molecular architecture. Zinc(II) chelate complexes were studied as models for the active site of carbonic anhydrase and other hydrolytically active enzymes [5,6]. The role of zinc(II) structural properties in protein folding is also extensively studied [7][8][9][10]. The title complex is am ononuclear zinc(II) complex with a Schiff-base ligand. Zn(II) atom is four-coordinated by two N atoms and two Oa toms from two Schiff-base ligands in ad istorted tetrahedral arrangement. The dihedral angle between the coordination planes (N1/Zn1/O1 and N1A/Zn1A/O1A) is 84.23(5)°,a nd the dihedral angles between the plane sixmembered ring (C1/C2/C3/C4/C5/C6) and the plane N1/Zn1/O1 is 17.91(8)°(symmetry codes A: -x,y,½-z). The bond angles ∠O1-Zn1-O1 and ∠N1-Zn1-N1 are 122.4(1)°and 119.0(1)°, respectively. The other angles subtended at the Zn(II) ion are in the range of 95.12(7)°-113.57(7)°.The average bond lengths of Zn-Oand Zn-Nare 1.923(2) and 2.002(2) Å,respectively.

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Synthesis, reactions and structure of a hydroxo-bridged dinuclear Zn(II) complex: modeling the hydrolytic zinc enzymes

Cited by 32 publications

References 26 publications

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ⁴N,N′,N′′,N′′′]zinc(II) perchlorate

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ⁴N,N′,N′′,N′′′]zinc(II) perchlorate

Crystal structure of bis(3,5-dibromo-N-isopropylsalicylaldiminato- κ2N,O)zinc(II), Zn(C10H10Br2NO)2

Crystal structure of bis(3,5-dichloro-N-n-propylsalicylaldiminato- N,O)zinc(II), Zn(C10H10Cl2NO)2

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Synthesis, reactions and structure of a hydroxo-bridged dinuclear Zn(II) complex: modeling the hydrolytic zinc enzymes

Cited by 32 publications

References 26 publications

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ4N,N′,N′′,N′′′]zinc(II) perchlorate

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ4N,N′,N′′,N′′′]zinc(II) perchlorate

Crystal structure of bis(3,5-dibromo-N-isopropylsalicylaldiminato- κ2N,O)zinc(II), Zn(C10H10Br2NO)2

Crystal structure of bis(3,5-dichloro-N-n-propylsalicylaldiminato- N,O)zinc(II), Zn(C10H10Cl2NO)2

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(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ⁴N,N′,N′′,N′′′]zinc(II) perchlorate

(Acetonitrile-κN)aqua[N,N′-bis(pyridin-2-ylmethyl)ethane-1,2-diamine-κ⁴N,N′,N′′,N′′′]zinc(II) perchlorate