Coordination preference of hexa(2-pyridyl)benzene with copper(ii) directed by hydrogen bonding

CrystEngComm ◽  
2018 ◽  
Vol 20 (35) ◽  
pp. 5233-5240 ◽  
Author(s):  
Hyunchul Kwon ◽  
Eunsung Lee
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Modes

Coordination modes of hexa(2-pyridyl)benzene ligand with copper(ii) ions were controlled by different solvents mainly due to hydrogen bonding.

scholarly journals Synthesis, Structural Characterization and Ligand-Enhanced Photo-Induced Color-Changing Behavior of Two Hydrogen-Bonded Ho(III)-Squarate Supramolecular Compounds

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1369 ◽  
Author(s):  
Wang ◽  
Ke ◽  
Feng ◽  
Ho ◽  
Chang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Uv Light ◽  
Squaric Acid ◽  
Water Molecules ◽  
Light Illumination ◽  
Supramolecular Architecture ◽  
Bridging Ligands ◽  
Coordination Modes ◽  
Oxygen Atoms ◽  
Hydrogen Bonded

Two coordination polymers (CPs) with chemical formulas, [Ho2(C4O4)2(C2O4)(H2O)8]·4H2O (1) and [Ho(C4O4)1.5(H2O)3] (2), (C4O42− = dianion of squaric acid, C2O42− = oxalate), have been synthesized and their structures were determined by single-crystal X-ray diffractometer (XRD). In compound 1, the coordination environment of Ho(III) ion is eight-coordinate bonded to eight oxygen atoms from two squarate, one oxalate ligands and four water molecules. The squarates and oxalates both act as bridging ligands with 1,2-bis-monodentate and bis-chelating coordination modes, respectively, connecting the Ho(III) ions to form a one-dimensional (1D) ladder-like framework. Adjacent ladders are interlinked via O–HO hydrogen bonding interaction to form a hydrogen-bonded two-dimensional (2D) layered framework and then arranged orderly in an AAA manner to construct its three-dimensional (3D) supramolecular architecture. In compound 2, the coordination geometry of Ho(III) is square-antiprismatic eight coordinate bonded to eight oxygen atoms from five squarate ligands and three water molecules. The squarates act as bridging ligands with two coordination modes, 1,2,3-trismonodentate and 1,2-bis-monodentate, connecting the Ho(III) ions to form a 2D bi-layered framework. Adjacent 2D frameworks are then parallel stacked in an AAA manner to construct its 3D supramolecular architecture. Hydrogen bonding interactions between the squarate ligands and coordinated water molecules in 1 and 2 both play important roles on the construction of their 3D supramolecular assembly. Compounds 1 and 2 both show remarkable ligand-enhanced photo-induced color-changing behavior, with their pink crystals immediately turning to yellow crystals under UV light illumination.

Hydrogen bonding promotes diversity in nitrite coordination modes at a single iron(II) center

2020 ◽  
Vol 73 (17-19) ◽  
pp. 2664-2676 ◽  
Author(s):  
D. M. M. Mevan Dissanayake ◽  
Brittney E. Petel ◽  
William W. Brennessel ◽  
Kara L. Bren ◽  
Ellen M. Matson
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Modes

scholarly journals Palladium(II) complexes of a bridging amine bis(phenolate) ligand featuring κ2 and κ3 coordination modes

2019 ◽  
Vol 75 (8) ◽  
pp. 1265-1269 ◽  
Author(s):  
Brendan J. Graziano ◽  
Bradley M. Wile ◽  
Matthias Zeller
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Planar Geometry ◽  
Intermolecular Hydrogen Bonding ◽  
Coordination Modes ◽  
Methyl Methyl ◽  
Ethyl Methyl ◽  
Square Planar ◽  
Solvent Molecules ◽  
Insight Into

Bidentate and tridentate coordination of a 2,4-di-tert-butyl-substituted bridging amine bis(phenolate) ligand to a palladium(II) center are observed within the same crystal structure, namely dichlorido({6,6′-[(ethane-1,2-diylbis(methylazanediyl)]bis(methylene)}bis(2,4-di-tert-butylphenol))palladium(II) chlorido(2,4-di-tert-butyl-6-{[(2-{[(3,5-di-tert-butyl-2-hydroxyphenyl)methyl](methyl)amino}ethyl)(methyl)amino]methyl}phenolato)palladium(II) methanol 1.685-solvate 0.315-hydrate, [PdCl2(C34H56N2O2)][PdCl(C34H55N2O2)]·1.685CH3OH·0.315H2O. Both complexes exhibit a square-planar geometry, with unbound phenol moieties participating in intermolecular hydrogen bonding with co-crystallized water and methanol. The presence of both κ2 and κ3 coordination modes arising from the same solution suggest a dynamic process in which phenol donors may coordinate or dissociate from the metal center, and offers insight into catalyst speciation throughout Pd-mediated processes. The unit cell contains dichlorido({6,6′-[(ethane-1,2-diylbis(methylazanediyl)]bis(methylene)}bis(2,4-di-tert-butylphenol))palladium(II), {(L 2)PdCl2}, and chlorido(2,4-di-tert-butyl-6-{[(2-{[(3,5-di-tert-butyl-2-hydroxyphenyl)methyl](methyl)amino}ethyl)(methyl)amino]methyl}phenolato)palladium(II), {(L 2 X)PdCl}, molecules as well as fractional water and methanol solvent molecules.

scholarly journals Synthesis and Structure of the Copper Complex[Cu2L2ox(SO4)(H2O)4](H2O)4

2021 ◽  
Vol 290 ◽  
pp. 01010
Author(s):  
Zhaodong Wang
Keyword(s):  
Hydrogen Bonding ◽  
Copper Complex ◽  
Water Molecules ◽  
X Ray ◽  
Coordination Modes ◽  
3D Networks

The reaction of N-(pyridine-2-ylmethyl)pyrazine-2-carboxamide (HL) and copper(II) sulfate leads to the formation of a new copper complex, [Cu2L2ox(SO4)(H2O)4](H2O)4(1), in which the deprotonated amide L-ligand was oxidized to a imide Lox-exposed to the air in the presence of the Cu ion. The X-ray crystal analysis reveals that it consists of two mononuclear copper unit with different coordination modes, multiple O-H…O hydrogen bonding between water molecules or water and sulfate O atom to form 3D networks. CCDC: 2088935,1.

Coordination Modes of Water-Derived Bridging Ligands in Diiron(III) Complexes: Stabilization of an Oxo-Hydroxo Bridge by Hydrogen Bonding

1995 ◽  
Vol 117 (51) ◽  
pp. 12865-12866 ◽  
Author(s):  
Miroslav Rapta ◽  
Peter Kamaras ◽  
Gregory A. Brewer ◽  
Geoffrey B. Jameson
Keyword(s):  
Hydrogen Bonding ◽  
Bridging Ligands ◽  
Coordination Modes

Assembly and Properties of Four New Metal–Organic Complexes Based on 1,4-Naphthalenedicarboxylate: Effect of Four Bis-pyridyl-bis-amide Ligands with Diverse Spacers in the Structures

2015 ◽  
Vol 68 (10) ◽  
pp. 1550 ◽  
Author(s):  
Hong-Yan Lin ◽  
Xun-Zhang Zhao ◽  
Ling Zeng ◽  
Qing-Lin Wang ◽  
Xiu-Li Wang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Photocatalytic Properties ◽  
Coordination Modes ◽  
Coordination Network ◽  
Amide Ligands ◽  
Hydrogen Bonding Interactions ◽  
Organic Complexes ◽  
3D Architecture ◽  
Metal Organic ◽  
Supramolecular Networks

Four new complexes based on 1,4-naphthalenedicarboxylic acid (1,4-H2NDC) and four bis-pyridyl-bis-amide ligands with various spacers (3-bpye = N,N′-bis(3-pyridinecarboxamide)-1,2-ethane; 3-bpfp = bis(3-pyridylformyl)piperazine; 3-bpcd = N,N′-bis(pyridin-3-yl)cyclohexane-1,4-dicarboxamide; and 3-bpcb = N,N′-bis(3-pyridinecarboxamide)-1,4-benzene), namely [Cu2(1,4-NDC)2(3-bpye)(H2O)] (1), [Cu(1,4-NDC)(3-bpfp)0.5] (2), [Cu3(1,4-NDC)3(3-bpcd)3]·2H2O (3), and [Cu(1,4-NDC)(3-bpcb)] (4), have been hydrothermally synthesized. Complex 1 is a 3D coordination network and represents an 8-connected {420.68} topology. Complex 2 shows a 2-fold interpenetrating 3D architecture with a 6-connected {412.63} topology. Complexes 3 and 4 possess similar 2D sql layers with the {44.62} topology, but the coordination modes of 1,4-NDC ligands and the conformations of the two bis-pyridyl-bis-amide ligands are different. The adjacent layers for 3 and 4 are further linked by hydrogen bonding interactions to form 3D supramolecular networks. The successful assemblies of complexes 1–4 imply that by using the different bis-pyridyl-bis-amide ligands with diverse spacers can produce diverse metal–organic networks. Furthermore, the fluorescence and photocatalytic properties of complexes 1–4 have been investigated.

Synthesis and Structural Characterisation of Lithium, Zinc, and Aluminium Pyrazolate Complexes

2020 ◽  
Vol 73 (6) ◽  
pp. 520 ◽  
Author(s):  
Nazli E. Rad ◽  
Peter C. Junk ◽  
Glen B. Deacon ◽  
Ilya V. Taidakov ◽  
Jun Wang
Keyword(s):  
Hydrogen Bonding ◽  
Zinc Complex ◽  
Polymeric Compound ◽  
Coordination Modes ◽  
Structural Characterisation ◽  
Hexanuclear Complex ◽  
Tetrameric Complex

The reaction of nBuLi with 3,5-dimethylpyrazole (Me2pzH) in Et2O or tmeda/hexane (tmeda=N,N,N′,N′-tetramethylethane-1,2-diamine) and with 3,5-dimethyl-4-nitropyrazolate (Me2pzHNO2) in THF results in the formation of three structurally diverse lithium pyrazolates: namely an Et2O-solvated tetrameric complex [Li4(Me2pz)4(OEt2)4], bridged entirely with μ-η2:η1-pyrazolate bonding, a hexanuclear complex [Li6(Me2pz)6(tmeda)2] with four different coordination modes (μ-η1:η1, μ-η2:η1, μ3-η1:η2:η1 and μ3-η2:η2:η1), and a new polymeric compound [Li2(Me2pzNO2)2(thf)2]n, with [Li2(Me2pzNO2)2(thf)2] groups linked by –NO2 coordination. A mononuclear zinc complex [Zn(tBu2pz)2(tBu2pzH)2].1/2THF (tBu2pzH=3,5-di-tert-butylpyrazole) was prepared by reaction of tBu2pzH with ZnEt2, unidentate tBu2pz groups being stabilised by N–H⋯N hydrogen bonding. Treatment of 3,5-diphenylpyrazole (Ph2pzH) with trimethylaluminium (mole ratio 3:1) in THF led to the formation of dinuclear [AlMe2(μ-Ph2pz)]2.1/2THF.

Interplay of hydrogen bonding and coordination modes in diaquabis(8-hydroxy-7-iodoquinoline-5-sulfonato)calcium(II) monohydrate

2003 ◽  
Vol 59 (12) ◽  
pp. m1160-m1163 ◽  
Author(s):  
Savarimuthu Francis ◽  
Packianathan Thomas Muthiah ◽  
Urszula Rychlewska ◽  
Beata Warżajtis
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Modes

Hydrogen Bonding and Isomerism Arising from the Coordination Modes of Bridging Benzimidazole-2-thiolate Ligands in Tetranuclear Rhodium Complexes

1998 ◽  
Vol 37 (16) ◽  
pp. 3954-3963 ◽  
Author(s):  
Cristina Tejel ◽  
B. Eva Villarroya ◽  
Miguel A. Ciriano ◽  
Andrew J. Edwards ◽  
Fernando J. Lahoz ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Rhodium Complexes ◽  
Coordination Modes ◽  
Thiolate Ligands
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