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Supramolecular cis-“Bis(Chelation)” of [M(CN)6]3− (M = CrIII, FeIII, CoIII) by Phloroglucinol (H3PG). Molecules 2022; 27:molecules27134111. [PMID: 35807353 PMCID: PMC9268030 DOI: 10.3390/molecules27134111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/15/2022] [Accepted: 06/17/2022] [Indexed: 02/04/2023] Open
Abstract
Studies on molecular co-crystal type materials are important in the design and preparation of easy-to-absorb drugs, non-centrosymmetric, and chiral crystals for optical performance, liquid crystals, or plastic phases. From a fundamental point of view, such studies also provide useful information on various supramolecular synthons and molecular ordering, including metric parameters, molecular matching, energetical hierarchy, and combinatorial potential, appealing to the rational design of functional materials through structure–properties–application schemes. Co-crystal salts involving anionic d-metallate coordination complexes are moderately explored (compared to the generality of co-crystals), and in this context, we present a new series of isomorphous co-crystalline salts (PPh4)3[M(CN)6](H3PG)2·2MeCN (M = Cr, 1; Fe, 2; Co 3; H3PG = phloroglucinol, 1,3,5-trihydroxobenzene). In this study, 1–3 were characterized experimentally using SC XRD, Hirshfeld analysis, ESI-MS spectrometry, vibrational IR and Raman, 57Fe Mössbauer, electronic absorption UV-Vis-NIR, and photoluminescence spectroscopies, and theoretically with density functional theory calculations. The two-dimensional square grid-like hydrogen-bond {[M(CN)6]3−;(H3PG)2}∞ network features original {[M(CN)6]3−;(H3PG)4} supramolecular cis-bis(chelate) motifs involving: (i) two double cyclic hydrogen bond synthons M(-CN⋅⋅⋅HO-)2Ar, {[M(CN)6]3−;H2PGH}, between cis-oriented cyanido ligands of [M(CN)6]3− and resorcinol-like face of H3PG, and (ii) two single hydrogen bonds M-CN⋅⋅⋅HO-Ar, {[M(CN)6]3−;HPGH2}, involving the remaining two cyanide ligands. The occurrence of the above tectonic motif is discussed with regard to the relevant data existing in the CCDC database, including the multisite H-bond binding of [M(CN)6]3− by organic species, mononuclear coordination complexes, and polynuclear complexes. The physicochemical and computational characterization discloses notable spectral modifications under the regime of an extended hydrogen bond network.
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Feng L, Chen Z, Zeller M, Luck RL. Dicopper moieties stabilized by Fréchet-type dendrons: Syntheses and structural characterizations. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Forrest WP, Cao Z, Chen WZ, Hassell KM, Kharlamova A, Jakstonyte G, Ren T. Decorating Diruthenium Compounds with Fréchet Dendrons via the Click Reaction. Inorg Chem 2011; 50:9345-53. [PMID: 21902231 DOI: 10.1021/ic200929r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- William P Forrest
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
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Cooke MW, Santoni MP, Hanan GS, Proust A, Hasenknopf B. A divergent strategy for covalently-tethered (tpy)2Ru(ii) systems based on Rh2(N,N′-diphenylbenzamidinates)4. Dalton Trans 2009:3671-3. [DOI: 10.1039/b904011k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chen WZ, Fanwick PE, Ren T. Dendronized Diruthenium Compounds via the Copper(I)-Catalyzed Click Reaction. Inorg Chem 2007; 46:3429-31. [PMID: 17397147 DOI: 10.1021/ic0702623] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Novel Ru2-containing dendritic compounds were prepared from the CuI-catalyzed 1,3-dipolar cycloaddition between Ru2 compounds containing one or two ethynes, Ru2(D(3,5-Cl2Ph)F)4-n(DMBA-4-C2H)n with n=1 and 2, and azidopoly(benzyl ether) dendrons. These new compounds were also characterized with X-ray diffraction and voltammetric techniques.
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Affiliation(s)
- Wei-Zhong Chen
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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Roland BK, Flora WH, Selby HD, Armstrong NR, Zheng Z. Dendritic Arrays of [Re6(μ3-Se)8]2+ Core-Containing Clusters: Exploratory Synthesis and Electrochemical Studies. J Am Chem Soc 2006; 128:6620-5. [PMID: 16704262 DOI: 10.1021/ja057548w] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction between the previously reported site-differentiated cluster solvate [Re(6)(mu(3)-Se)(8)(PEt(3))(5)(MeCN)](SbF(6))(2) (1) with pyridyl-based ditopic ligands 4,4'-trimethylenedipyridine (2), 1,2-bis(4-pyridyl)ethane (3), and (E)-1,2-bis(4-pyridyl)ethene (4) afforded cluster complexes of the general formula [Re(6)(mu(3)-Se)(8)(PEt(3))(5)(L)](SbF(6))(2) (5-7), where L represents one of the pyridyl-based ligands. Reacting these cluster complex-based ligands with the fully solvated cluster complex [Re(6)(mu(3)-Se)(8)(MeCN)(6)](SbF(6))(2) (8) produced dendritic arrays of the general formula {Re(6)(mu(3)-Se)(8)[Re(6)(mu(3)-Se)(8)(PEt(3))(5)(L)](6)}(SbF(6))(14) (9-11), each featuring six circumjacent [Re(6)(mu(3)-Se)(8)(PEt(3))(5)](2+) units bridged to a [Re(6)(mu(3)-Se)(8)](2+) core cluster by the pyridyl-based ligands. Electrochemical studies using a thin-layer electrochemical cell revealed cluster-based redox events in these cluster arrays. For 9 (L = 2), one reversible oxidation event corresponding to the removal of 7 electrons was observed, indicating noninteraction or extremely weak interactions between the clusters. For 10 (L = 3), two poorly resolved oxidation waves were found. For 11 (L = 4), two reversible oxidation events, corresponding respectively to the removal of 1 and 6 electrons, were observed with the 1-electron oxidation event occurring at a potential 150 mV more positive than the 6-electron oxidation. These electrochemical studies suggest intercluster coupling in 11 via through-bond electronic delocalization, which is consistent with electronic spectroscopic studies of this same molecule.
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Affiliation(s)
- Bryan K Roland
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, USA
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Cotton FA, Liu CY, Murillo CA, Villagrán D, Wang X. Modifying Electronic Communication in Dimolybdenum Units by Linkage Isomers of Bridged Oxamidate Dianions. J Am Chem Soc 2003; 125:13564-75. [PMID: 14583054 DOI: 10.1021/ja036884e] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions of Mo(2)(O(2)CCH(3))(DAniF)(3), DAniF = N,N'-di-p-anisylformamidinate, with oxamidate dianions [ArNC(O)C(O)NAr](2-), Ar = C(6)H(5) and p-anisyl, give pairs of isomeric compounds where the [Mo(2)] units are bridged by the oxamidate anions. For the alpha isomers, the C-C unit of the dianion is nearly perpendicular to the Mo-Mo bonds, and these are essentially perpendicular to each other. For the beta isomers, the corresponding C-C unit and the Mo-Mo bonds are essentially parallel to each other. Each type of isomer is stable in solution. The electronic communication as measured by the DeltaE(1/2) for the oxidation of each of the Mo(2) units is significantly better for the beta isomers. This is supported also by the appearance of what is conventionally called an intervalence charge-transfer band in the near infrared region upon oxidation of the beta isomers but not the alpha isomers. Molecular mechanics and DFT calculations help explain the relative conformations in the alpha isomers and the relative energy differences between the alpha and beta isomers.
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Affiliation(s)
- F Albert Cotton
- Laboratory for Molecular Structure and Bonding, Department of Chemistry, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012, USA.
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9
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Liwporncharoenvong T, Luck RL. The effects, assessed by electrochemical techniques and single crystal structures, of ortho substitution on benzoate ligands supporting the quadruply-bonded dimolybdenum bond. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)01095-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Cotton FA, Daniels LM, Hillard EA, Murillo CA. Filling a void: isolation and characterization of tetracarboxylato dimolybdenum cations. Inorg Chem 2002; 41:1639-44. [PMID: 11896734 DOI: 10.1021/ic011079r] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dimolybdenum tetracarboxylato cations have been prepared and structurally characterized for the first time. The reactions of the new, quadruply bonded compound, Mo(2)(TiPB)(4), where TiPB = 2,4,6-triisopropylphenyl carboxylate, with NOPF(6) and NOBF(4) give the ionic compounds [Mo(2)(TiPB)(4)]PF(6) and [Mo(2)(TiPB)(4)]BF(4), respectively. Each product crystallizes in space group P2(1)/n and displays an elongation of the Mo-Mo bond of 0.060 and 0.068 A, respectively, over that of the parent compound (2.076(1) A). Each complex displays a characteristic EPR signal, showing hyperfine coupling to the spin active isotopes (95)Mo and (97)Mo, with g( parallel) = g( perpendicular) = 1.936, that is consistent with the presence of an unpaired electron. Electronic spectroscopy indicates the expected red shift in the delta --> delta(*) transition for the cations, due to the loss of exchange energy in going from the two-electron to one-electron system. We have also obtained a small amount of crystalline [Mo(2)(O(2)CC(4)H(9))(4)]PF(6) from the reaction of Mo(2)(O(2)CC(4)H(9))(4) with AgPF(6). This product crystallizes in the space group C2/c, and the Mo-Mo bond is elongated by 0.063 A over that of the neutral parent compound. These ionic compounds have the first isolated and characterized [Mo(2)(O(2)CR)(4)](+) cationic species.
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Affiliation(s)
- F Albert Cotton
- Department of Chemistry and Laboratory for Molecular Structure and Bonding, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012, USA.
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11
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Syntheses, structures and electrochemistry of two complexes containing quadruply bonded dimolybdenum atoms. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(01)00796-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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McMenimen KA, Hamilton DG. Mellitic triimides: C(3)-symmetric, three-electron acceptors for supramolecular chemistry. J Am Chem Soc 2001; 123:6453-4. [PMID: 11427087 DOI: 10.1021/ja016043c] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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