1
|
Covalent post-synthetic modified metal-organic framework UIO-66-NH2-HNA for selective and sensitive turn-on detection of acetylacetone, S2-, and PO43-. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
2
|
Starikova AA, Starikov AG, Minkin VI. DFT computational insight into the mechanism of the monomer–trimer isomerism of Ni(II) bis-acetylacetonate. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
3
|
Stabnikov PA, Alferova NI, Korolkov IV, Pervukhina NV, Trubin SV, Babailov SP, Turgambaeva AE. NEW γ-SUBSTITUTED β-DIKETONATES OF Al(III), Fe(III), AND Cu(II). J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476620100145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
Han H, Wei Z, Barry MC, Filatov AS, Dikarev EV. Heterometallic molecular precursors for a lithium-iron oxide material: synthesis, solid state structure, solution and gas-phase behaviour, and thermal decomposition. Dalton Trans 2018; 46:5644-5649. [PMID: 28144673 DOI: 10.1039/c6dt04602a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Three heterometallic single-source precursors with a Li : Fe = 1 : 1 ratio for a LiFeO2 oxide material are reported. Heterometallic compounds LiFeL3 (L = tbaoac (1), ptac (2), and acac(3)) have been obtained on a large scale, in nearly quantitative yields by one-step reactions that employ readily available reagents. The heterometallic precursor LiFe(acac)3 (3) with small, symmetric substituents on the ligand (acac = pentane-2,4-dionate), maintains a 1D polymeric structure in the solid state that limits its volatility and prevents solubility in non-coordinating solvents. The application of the unsymmetrical ligands, tbaoac (tert-butyl acetoacetate) and ptac (1,1,1-trifluoro-5,5-dimethyl-2,4-hexanedionate), that exhibit different bridging properties at the two ends of the ligand, allowed us to change the connectivity pattern within the heterometallic assembly. The latter was demonstrated by structural characterization of heterometallic complexes LiFe(tbaoac)3 (1) and LiFe(ptac)3 (2) that consist of discrete heterocyclic tetranuclear molecules Li2Fe2L6. The compounds are highly volatile and exhibit a congruent sublimation character. DART mass spectrometric investigation revealed the presence of heterometallic molecules in the gas phase. The positive mode spectra are dominated by the presence of [M - L]+ peaks (M = Li2Fe2L6). In accord with their discrete molecular structure, complexes 1 and 2 are highly soluble in nearly all common solvents. In order to test the retention of the heterometallic structure in solution, the diamagnetic analog of 1, LiMg(tbaoac)3 (4), has been isolated. Its tetranuclear molecular structure was found to be isomorphous to that of the iron counterpart. 1H and 7Li NMR spectroscopy unambiguously confirmed the presence of heterometallic molecules in solutions of non-coordinating solvents. The heterometallic precursor 1 was shown to exhibit clean thermal decomposition in air that results in phase-pure α-modification of layered oxide LiFeO2, the prospective cathode material for lithium ion batteries.
Collapse
Affiliation(s)
- Haixiang Han
- Department of Chemistry, University at Albany, SUNY, Albany, NY, USA.
| | | | | | | | | |
Collapse
|
5
|
Kołodziejski M, Walczak A, Hnatejko Z, Harrowfield J, Stefankiewicz AR. Unsymmetrical bidentate ligands as a basis for construction of ambidentate ligands for functional materials: Properties of 4,4-dimethyl-1-phenylpentane-1,3-dionate. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.08.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
6
|
Cosham SD, Richards SP, Manning T, Hill MS, Johnson AL, Molloy KC. Precursors for p‐Type Nickel Oxide: Atmospheric‐Pressure Metal–Organic Chemical‐Vapour Deposition (MOCVD) of Nickel Oxide Thin Films with High Work Functions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Troy Manning
- Department of Chemistry University of Liverpool L69 7ZF Liverpool UK
| | | | | | | |
Collapse
|
7
|
|
8
|
Yoshida J, Sugawara K, Yuge H, Okabayashi J. Bis(acetylacetonato)bis(pyrazolato)ruthenate(iii) as a redox-active scorpionate ligand. Dalton Trans 2015; 43:16066-73. [PMID: 25238163 DOI: 10.1039/c4dt02331e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The potential of a new anionic octahedral metal complex [Ru(III)(acac)2(pz)2](-) ((-)) (pzH = pyrazole) as a ligand with a scorpionate coordination behaviour like tris(pyrazolyl)borate (tp) and reversible redox activity is presented. Trinuclear metal complexes, [Ru(III)2Zn(II)(acac)4(pz)4] () and [Ru(II)Ru(III)2(acac)4(pz)4] (), were each synthesized by the reaction of ZnCl2 or Ru3(CO)12 with [Ru(III)(acac)2(pz)(pzH)] (H) that is in situ deprotonated and acts as a precursor of (-). Single-crystal X-ray diffraction studies clarified that (-) acts as a scorpionate ligand; two (-) units in and one unit in function as bidentate ligands with two pyrazolates as pincers, while another (-) unit in functions as a tridentate ligand with one oxygen atom as a tail in addition to the two pyrazolate pincers. Moreover, and showed reversible multi-stage redox behaviours based on the Ru(II)/Ru(III) and Ru(III)/Ru(IV) couples of the (-) units in the cyclic voltammetry (CV) measurements. Based on the X-ray, IR, and CV measurements and the comparison with other Ru(ii) complexes with tp derivatives, the (-) unit was found to act as a redox-active scorpionate with electron withdrawing properties compared to the tp.
Collapse
Affiliation(s)
- Jun Yoshida
- Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0329, Japan.
| | | | | | | |
Collapse
|
9
|
Shtokvish OO, Koval LI, Pekhnyo VI. Crystal structure of hexa-kis-(μ2-4-tert-but-oxy-4-oxobut-2-en-2-olato)trizinc. Acta Crystallogr Sect E Struct Rep Online 2014; 70:483-5. [PMID: 25552972 PMCID: PMC4257390 DOI: 10.1107/s1600536814024337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Accepted: 11/05/2014] [Indexed: 11/11/2022]
Abstract
The structure of a centrosymmetric trinuclear zinc(II) complex with the formula [Zn{ZnL3}2], where L is 4-tert-butoxy-4-oxobut-2-en-2-olate, is presented. The title complex, systematic name hexakis(μ2-4-tert-butoxy-4-oxobut-2-en-2-olato)-1:2κ9O2,O4:O2;2:3κ9O2,O4:O2-trizinc, [Zn3(C8H13O3)6], synthesized from tert-butyl acetoacetate and diethylzinc, consists of trinuclear centrosymmetric molecules of an approximate C3i symmetry. The three metal cations are arranged in a linear fashion, with the central ZnII atom located on a centre of symmetry. All three metal cations exhibit a distorted octahedral coordination geometry. The terminal ZnII cations are chelated by three tert-butyl acetoacetate ligands and these units are connected to the central ZnII atom by the bridging enolate O atoms.
Collapse
Affiliation(s)
- Olgerd O Shtokvish
- V. I. Vernadskii Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Prospect Palladina 32-34, 03680 Kyiv, Ukraine
| | - Lyudmila I Koval
- V. I. Vernadskii Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Prospect Palladina 32-34, 03680 Kyiv, Ukraine
| | - Vasyl I Pekhnyo
- V. I. Vernadskii Institute of General and Inorganic Chemistry, Ukrainian National Academy of Sciences, Prospect Palladina 32-34, 03680 Kyiv, Ukraine
| |
Collapse
|
10
|
Tenorio MJ, Cabañas A, Pando C, Renuncio JAR. Solubility of Pd(hfac)2 and Ni(hfac)2·2H2O in supercritical carbon dioxide pure and modified with ethanol. J Supercrit Fluids 2012. [DOI: 10.1016/j.supflu.2012.06.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
11
|
Synthesis and crystal structures of 3-alkyl-2,4-pentanedionates and 3-phenyl-2,4-pentanedionate of palladium. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.02.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
12
|
Vreshch VD, Yang JH, Zhang H, Filatov AS, Dikarev EV. Monomeric square-planar cobalt(II) acetylacetonate: mystery or mistake? Inorg Chem 2011; 49:8430-4. [PMID: 20795642 DOI: 10.1021/ic100963r] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
No evidence was found for the existence of a previously reported mononuclear square-planar form of unsolvated cobalt(II) acetylacetonate, Co(acac)(2), in all samples that have been obtained by using a variety of preparative techniques and crystallization conditions. It was confirmed that the structure of tetramer Co(4)(acac)(8), reported back in 1964 by Cotton and Elder, is correct, the synthesis is reproducible, and the bulk material corresponds to single-crystal data. Additionally, the title compound can be isolated in tetranuclear form by reducing cobalt(III) acetylacetonate with cobalt metal in solvent-free conditions or by crystallization from a hexanes solution. At the same time, from noncoordinating halogenated solvents, Co(acac)(2) crystallizes as a trinuclear core molecule, in which all Co atoms also exhibit octahedral coordination. From coordinating solvents such as ethanol, cobalt(II) acetylacetonate was found to appear in the form of its bis-adduct Co(acac)(2)(EtOH)(2). On the basis of observations made in this work and the details presented in the original paper, we suggest that the reported mononuclear structure of square-planar acetylacetonate should likely contain copper instead of cobalt.
Collapse
Affiliation(s)
- Volodimir D Vreshch
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, USA
| | | | | | | | | |
Collapse
|
13
|
Aakeröy CB, Sinha AS, Chopade PD, Desper J. Halogen bonding or close packing? Examining the structural landscape in a series of Cu(ii)-acac complexes. Dalton Trans 2011; 40:12160-8. [DOI: 10.1039/c1dt10911a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Starikov AG. Quantum-chemical study of intramolecular spin-forbidden rearrangements of the transition metal chelate complexes. RUSS J GEN CHEM+ 2010. [DOI: 10.1134/s107036320912038x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
15
|
Zheng B, Miranda MO, DiPasquale AG, Golen JA, Rheingold AL, Doerrer LH. Synthesis and Electronic Spectra of Fluorinated Aryloxide and Alkoxide [NiX4]2− Anions. Inorg Chem 2009; 48:4274-6. [PMID: 19331370 DOI: 10.1021/ic9003593] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- BingNa Zheng
- Chemistry Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, and University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Maria O. Miranda
- Chemistry Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, and University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Antonio G. DiPasquale
- Chemistry Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, and University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - James A. Golen
- Chemistry Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, and University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Arnold L. Rheingold
- Chemistry Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, and University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Linda H. Doerrer
- Chemistry Department, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, Chemistry Department, Barnard College, 3009 Broadway, New York, New York 10027, and University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| |
Collapse
|
16
|
Zhang H, Li B, Sun J, Clérac R, Dikarev EV. Fluorinated β-Diketonates of the First Row Divalent Transition Metals: New Approach to the Synthesis of Unsolvated Species. Inorg Chem 2008; 47:10046-52. [DOI: 10.1021/ic801320p] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Haitao Zhang
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Bo Li
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Jinyu Sun
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Rodolphe Clérac
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| | - Evgeny V. Dikarev
- Department of Chemistry, University at Albany, SUNY, Albany, New York 12222, CNRS, UPR 8641, Centre de Recherche Paul Pascal (CRPP), Equipe “Matériaux Moléculaires Magnétiques”, 115 avenue du Dr. Albert Schweitzer, Pessac, F-33600, France, and Université de Bordeaux, UPR 8641, Pessac, F-33600, France
| |
Collapse
|
17
|
Theoretical modeling of the square-planar to tetrahedral isomerization of bis-chelate nickel(II) complexes. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.04.132] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
18
|
Bertolasi V, Ferretti V, Gilli P, Yao X, Li CJ. Substituent effects on keto–enol tautomerization of β-diketones from X-ray structural data and DFT calculations. NEW J CHEM 2008. [DOI: 10.1039/b714708b] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
19
|
Li H, Yan J, Xu YY, Gao WG, Lee GH, Peng SM. Hydrogen-bonded assemblies of trinuclear metal string complexes. J COORD CHEM 2007. [DOI: 10.1080/00958970701308682] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Hui Li
- a Department of Chemistry , Beijing Institute of Technology , Beijing 100081, P.R. China
- b Department of Chemistry , National Taiwan University , Taipei, Taiwan 106
- c Institute of Chemistry, Academia Sinica , Taipei, Taiwan 115
| | - Jun Yan
- a Department of Chemistry , Beijing Institute of Technology , Beijing 100081, P.R. China
| | - Ying Ying Xu
- a Department of Chemistry , Beijing Institute of Technology , Beijing 100081, P.R. China
| | - Wen Gui Gao
- a Department of Chemistry , Beijing Institute of Technology , Beijing 100081, P.R. China
| | - Gene-Hsiang Lee
- b Department of Chemistry , National Taiwan University , Taipei, Taiwan 106
| | - Shie-Ming Peng
- b Department of Chemistry , National Taiwan University , Taipei, Taiwan 106
- c Institute of Chemistry, Academia Sinica , Taipei, Taiwan 115
| |
Collapse
|
20
|
Becker G, Niemeyer M, Mundt O, Schwarz W, Westerhausen M, Ossberger MW, Mayer P, N�th H, Zhong Z, Dijkstra PJ, Feijen J. Kristallstrukturen und spektroskopische Eigenschaften von 2?3-Phospha-1, 3-dionaten und 1, 3-Dionaten des Calciums - ein Vergleich am Beispiel der 1, 3-Diphenyl- und 1, 3-Di(tert-butyl)-Derivate. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.200400383] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
21
|
Kujime M, Hikichi S, Akita M. Synthesis and characterization of enolato-cobalt and -nickel complexes bearing TpiPr2 ligand, [TpiPr2M(XCHY)]n [TpiPr2=hydrotris(3,5-diisopropylpyrazolyl)borato; n=1, 2], obtained from hydroxometal complexes, (μ-OH)2(MTpiPr2)2, and active methylene compounds, CH2XY. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01547-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
22
|
Liu S, Inada Y, Funahashi S. Kinetics and Mechanism for the Metalation Reaction of 5,10,15,20-Tetrakis(pentafluorophenyl)porphyrin with Diaquabis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato)nickel(II) in Supercritical Carbon Dioxide. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
23
|
Trush EA, Amirkhanov VM, Ovchynnikov VA, Swiatek-Kozlowska J, Lanikina KA, Domasevitch KV. Metal carbacylamidophosphates: ability of coordination patterns to di- and polymerization. Polyhedron 2003. [DOI: 10.1016/s0277-5387(03)00128-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
Polyakov VR, Czerwinski M. Hydrogen-bonding in ethanol adducts to bis(3-R-penta-2,4-dionato)nickel(II) species. Inorg Chem 2001; 40:4798-802. [PMID: 11511232 DOI: 10.1021/ic991284v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ethanol adducts of bis(3-R-penta-2,4-dionato) nickel(II) have been prepared by recrystallization of the corresponding nickel bisacetylacetonate species from ethanol, and their crystal structures have been determined by X-ray diffraction: R = methyl, C16H30NiO6, a = 5.177(1), b = 9.326(1), c = 9.649(1), a = 95.39(1), beta = 100.04(1), gamma = 97.16(1), space group Ponebar, Z = 1; R = hex-5-enyl, C26H46NiO6, a = 5.176(1), b = 9.677(1), c = 14.458(1), a = 92.333(3), beta = 93.945(4), gamma = 96.011(6), space group Ponebar, Z = 1; R = phenyl, C26H34NiO6, a = 27.399(1), b = 5.349(1), c = 19.827(2), beta = 117.410(7), space group C2/c, Z = 4. The compounds show remarkable differences in their ability to form hydrogen bonds in the solid phase and in solution, depending upon the nature of the substituent in the 3-position of the acetylacetone fragment. Analysis of the strength of hydrogen bonds within the limits of supermolecular approximation based on the results of calculations by DFT method has been carried out and were found to correlate with experimental observations.
Collapse
Affiliation(s)
- V R Polyakov
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany.
| | | |
Collapse
|
25
|
|
26
|
Soldatov DV, Henegouwen AT, Enright GD, Ratcliffe CI, Ripmeester JA. Nickel(II) and zinc(II) dibenzoylmethanates: molecular and crystal structure, polymorphism, and guest- or temperature-induced oligomerization. Inorg Chem 2001; 40:1626-36. [PMID: 11261973 DOI: 10.1021/ic000981g] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four forms of nickel(II) and two of zinc(II) dibenzoylmethanates have been isolated and characterized with powder and single-crystal X-ray diffraction analyses, differential scanning calorimetry, magnetic susceptibility measurements, and solid-state 13C cross-polarization/magic angle spinning NMR. Nickel dibenzoylmethanate, Ni(DBM)2 (DBM = PhCOCHCOPh-), forms three polymorphic forms (light-green, brown, and green) and a fourth clathrate form with guest benzene included. The light-green polymorph is metastable. Substituted benzenes induce recrystallization of the polymorph into a stable brown form (C30H22NiO4; a = 26.502(3) A, b = 5.774(1) A, c = 16.456(2) A, beta = 116.03(1) degrees; monoclinic, C2/c; Z = 4). Unlike the other forms, the brown form is diamagnetic and is comprised of monomers of the low-spin [Ni(DBM)2] complex. The Ni(II) is chelated by two DBM ligands in a square planar environment by four donor oxygen atoms. When heated, the brown form transforms to a green form which is stable above 202 degrees C (C90H66Ni3O12; a = 13.819(2) A, b = 16.252(2) A, c = 17.358(2) A, beta = 108.28(1) degrees; monoclinic, P2(1)/n; Z = 2). This polymorph is formed by van der Waals packing of trimers [Ni3(DBM)6] containing linear Ni3 clusters with an Ni-Ni distance of 2.81 A. The cluster is surrounded by six DBM ligands, providing a distorted octahedral environment about each Ni by six oxygen atoms. Benzene stabilizes the trimeric structure at room temperature, forming a [Ni3(DBM)6].2(benzene) inclusion compound (Ni-Ni distance of 2.83 A) with guest benzene molecules located in channels (C90H66Ni3O12 + 2(C6H6); a = 17.670(2) A, b = 20.945(3) A, c=11.209(2) A, beta = 102.57(1) degrees; monoclinic, P2(1)/c; Z = 2). Zinc dibenzoylmethanate has been prepared in two polymorphic forms. The monomeric form contains [Zn(DBM)2] molecules with the zinc center in a distorted tetrahedral environment of four oxygens from the two chelated DBMs (C30H22O4Zn; a = 10.288(2) A, b = 10.716(2) A, c = 12.243(2) A, alpha = 89.19(1) degrees, beta = 75.39(1) degrees, gamma = 64.18(1) degrees; triclinic, P1; Z = 2). Another, dimeric form contains [Zn2(DBM)4] species, with two zinc atoms separated by a distance of 3.14 A and each zinc coordinated by five oxygen atoms (C60H44O8Zn2; a = 25.792(3) A, b = 7.274(1) A, c = 24.307(2) A, beta = 90.58(1) degrees; monoclinic, C2/c; Z = 4). The polymorphic variety of the title complexes and the peculiarities of the Ni(II) and Zn(II) coordination environments are discussed in the context of using the complexes as precursors for new metal complex hosts.
Collapse
Affiliation(s)
- D V Soldatov
- Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
| | | | | | | | | |
Collapse
|