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Holmes ST, Schurko RW. A DFT/ZORA Study of Cadmium Magnetic Shielding Tensors: Analysis of Relativistic Effects and Electronic-State Approximations. J Chem Theory Comput 2019; 15:1785-1797. [PMID: 30721042 DOI: 10.1021/acs.jctc.8b01296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Theoretical considerations are discussed for the accurate prediction of cadmium magnetic shielding tensors using relativistic density functional theory (DFT). Comparison is made between calculations that model the extended lattice of the cadmium-containing solids using periodic boundary conditions and pseudopotentials with calculations that use clusters of atoms. The all-electron cluster-based calculations afford an opportunity to examine the importance of (i) relativistic effects on cadmium magnetic shielding tensors, as introduced through the ZORA Hamiltonian at either the scalar (SC) or spin-orbit (SO) levels and (ii) variation in the class of the DFT approximation. Twenty-three combinations of pseudopotentials or all-electron methods, DFT functionals, and relativistic treatments are assessed for the prediction of the principal components of the magnetic shielding tensors of 30 cadmium sites. We find that the inclusion of SO coupling can increase the cadmium magnetic shielding by as much as ca. 1100 ppm for a certain principal values; these effects are most pronounced for cadmium sites featuring bonds to other heavy atoms such as cadmium, iodine, or selenium. The best agreement with experimental values is found at the ZORA SO level in combination with a hybrid DFT method featuring a large admixture of Hartree-Fock exchange such as BH&HLYP. Finally, a theoretical examination is presented of the magnetic shielding tensor of the Cd(I) site in Cd2(AlCl4)2.
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Affiliation(s)
- Sean T Holmes
- Department of Chemistry and Biochemistry , University of Windsor , Windsor , ON , Canada N9B 3P4
| | - Robert W Schurko
- Department of Chemistry and Biochemistry , University of Windsor , Windsor , ON , Canada N9B 3P4
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2
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Semeniuc RF, Reger DL. Metal Complexes of Multitopic, Third Generation Poly(pyrazolyl)methane Ligands: Multiple Coordination Arrangements. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600116] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Radu F. Semeniuc
- Department of Chemistry; Eastern Illinois University; 61920 Charleston IL USA
| | - Daniel L. Reger
- Department of Chemistry and Biochemistry; University of South Carolina; 29208 Columbia South Carolina USA
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Manzano BR, Jalón FA, Carrión MC, Durá G. Bis(pyrazol-1-yl)(pyridin-x-yl)methane Ligands - Mono- or Ditopic Ligands in Complexes and Supramolecular Frameworks. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501271] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Blanca R. Manzano
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
| | - Félix A. Jalón
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
| | - M. Carmen Carrión
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
- Facultad de Ciencias y Tecnologías Químicas-IRICA; Fundación Parque Científico y Tecnológico de Castilla-La Mancha (Fundación PCTCLM); Bulevar Río Alberche s/n 45007 Toledo Spain
| | - Gema Durá
- Departamento de Química Inorgánica, Orgánica y Bioquímica; Facultad de Ciencias y Tecnologías Químicas-IRICA; Universidad de Castilla-La Mancha; Avda. C. J. Cela, 10 13071 Ciudad Real Spain
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4
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Alvarez S. Distortion Pathways of Transition Metal Coordination Polyhedra Induced by Chelating Topology. Chem Rev 2015; 115:13447-83. [PMID: 26575868 DOI: 10.1021/acs.chemrev.5b00537] [Citation(s) in RCA: 127] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A continuous shape measures analysis of the coordination polyhedra of a host of transition metal complexes with bi- and multidentate ligands discloses the distortion pathway associated with each particular topology of the chelate rings formed. The basic parameter that controls the degree of distortion is the metal-donor atom bond distance that induces nonideal bond angles due to the rigidity of the ligands. Thus, the degree of distortion within each family of complexes depends on the atomic size, on which the high- or low-spin state has a large effect. Special attention is therefore paid to several spin-crossover systems and to the enhanced distortions that go along with the transition from low- to high-spin state affected by temperature, light, or pressure. Several families of complexes show deviations from the expected distortion pathways in the high-spin state that can be associated to the onset of intermolecular interactions such as secondary coordination of counterions or solvent molecules. Also, significant displacement of counterions in an extended solid may result from the changes in metal-ligand bond distances when ligands are involved in intermolecular hydrogen bonding.
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Affiliation(s)
- Santiago Alvarez
- Departament de Química Inorgànica and Institut de Química Teòrica i Computacional, Universitat de Barcelona , Martí i Franquès 1-11, 08028 Barcelona, Spain
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Banik R, Roy S, Bauza A, Frontera A, Das S. Cadmium(ii) complexes containing N,N′-dimethylviolurate as ligand or counteranion: synthesis, characterization, crystal structures and DFT study. RSC Adv 2015. [DOI: 10.1039/c4ra10251g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesis and X-ray characterization of two N,N′-dimethylvioluric acid (1) derivatives of formula [Cd(DMV)2(benzim)2] (2) (benzim = benzimidazole) and [Cd(H2O)4(py)2](DMV)2 (3) (py = pyridine) are reported.
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Affiliation(s)
- Rupak Banik
- Department of Chemistry
- National Institute of Technology (NIT)-Agartala
- India
| | - Subhadip Roy
- Department of Chemistry
- National Institute of Technology (NIT)-Agartala
- India
| | - Antonio Bauza
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma de Mallorca (Baleares)
- SPAIN
| | - Antonio Frontera
- Departament de Química
- Universitat de les Illes Balears
- 07122 Palma de Mallorca (Baleares)
- SPAIN
| | - Subrata Das
- Department of Chemistry
- National Institute of Technology (NIT)-Agartala
- India
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Reany O, Fuchs B. Lateral cis-1,3,5,7-tetraazadecalin podands and their complexes: synthesis, structure, and strong binding with Pb(II) and other heavy metal ions. Inorg Chem 2013; 52:1976-90. [PMID: 23360511 DOI: 10.1021/ic3023166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The chemistry and complexation behavior of diaminal podands based on cis-1,3,5,7-tetraazadecalin (cis-TAD) were elaborated, reassessed, and extended. The synthesis of 2,6-bis(hydroxymethylene)-cis-TAD (9) and 2,6-bis(α,α'-dimethyl-β- hydroxyethyl)-cis-TAD (10) as well as of suitably substituted 2,6-diaryl-cis-TAD podands is laid out. For the latter, the effect of electron donating or withdrawing substituents on the benzaldehyde reagents was examined while 9 and 10 were probed and showed considerable propensity for heavy metal-ion chelation. The [Cd(II)·(9)] and [Pb(II)·(9)] complexes stood out indeed, and their structure and properties show a particularly interesting 5-amino-1,3-diazane chelation type and strong ligand-ion binding mode, with intramolecular donor exchange in solution, all strongly influenced by the anomeric effect in the ligand.
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Affiliation(s)
- Ofer Reany
- School of Chemistry, Tel-Aviv University, Ramat-Aviv, 69978 Tel-Aviv, Israel.
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Hoffmann A, Flörke U, Herres-Pawlis S. Tris-phenyl substituted tris(pyrazolyl)methane: Victim of a novel rearrangement in a cobalt(II) complex. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.05.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Martín A, Mena M, Pérez‐Redondo A, Yélamos C. Cadmium and Mercury Complexes Containing Trinuclear Titanium Imido‐Nitrido Metalloligands. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100888] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Avelino Martín
- Departamento de Química Inorgánica, Universidad de Alcalá 28871 Alcalá de Henares‐Madrid, Spain, Fax: +34‐91‐8854683
| | - Miguel Mena
- Departamento de Química Inorgánica, Universidad de Alcalá 28871 Alcalá de Henares‐Madrid, Spain, Fax: +34‐91‐8854683
| | - Adrián Pérez‐Redondo
- Departamento de Química Inorgánica, Universidad de Alcalá 28871 Alcalá de Henares‐Madrid, Spain, Fax: +34‐91‐8854683
| | - Carlos Yélamos
- Departamento de Química Inorgánica, Universidad de Alcalá 28871 Alcalá de Henares‐Madrid, Spain, Fax: +34‐91‐8854683
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Katsoulakou E, Konidaris KF, Terzis A, Raptopoulou CP, Perlepes SP, Manessi-Zoupa E, Kostakis GE. One-dimensional cadmium(II)/bicinate(−1) complexes : The role of the alkali metal ion used in the reaction medium. Polyhedron 2011. [DOI: 10.1016/j.poly.2010.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Guerrero M, Pons J, Ros J, Font-Bardia M, Vallcorba O, Rius J, Branchadell V, Merkoçi A. Variable behaviour of flexible N,O-mixed pyrazole ligand towards Zn(ii), Cd(ii) and Hg(ii) ions. Synthesis, crystal structure and fluorescent properties. CrystEngComm 2011. [DOI: 10.1039/c1ce05626c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Synthesis, X-Ray Structure, and Characterization of Catena-bis(benzoate)bis{N,N-bis(2-hydroxyethyl)glycinate}cadmium(II). Bioinorg Chem Appl 2010:281932. [PMID: 20976297 PMCID: PMC2952795 DOI: 10.1155/2010/281932] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Accepted: 07/12/2010] [Indexed: 11/26/2022] Open
Abstract
The reaction of N, N-bis(2-hydroxyethyl)glycine (bicine; bicH3) with Cd(O2CPh)2 · 2H2O in MeOH yielded the polymeric compound [Cd2(O2CPh)2(bicH2)2]n(1). The complex crystallizes in the tetragonal space group P41212. The lattice constants are a = b = 12.737(5) and c = 18.288(7) Å. The compound contains chains of repeating {Cd2(O2CPh)2(bicH2)2} units. One CdII atom is coordinated by two carboxylate oxygen, four hydroxyl oxygen, and two nitrogen atoms from two symmetry-related 2.21111 (Harris notation) bicH2− ligands. The other CdII atom is coordinated by six carboxylate oxygen atoms, four from two bicH2− ligands and two from the monodentate benzoate groups. Each bicinate(-1) ligand chelates the 8-coordinate, square antiprismatic CdII atom through one carboxylate oxygen, the nitrogen, and both hydroxyl oxygen atoms and bridges the second, six-coordinate trigonal prismatic CdII center through its carboxylate oxygen atoms. Compound 1 is the first structurally characterized cadmium(II) complex containing any anionic form of bicine as ligand. IR data of 1 are discussed in terms of the coordination modes of the ligands and the known structure.
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Guerrero M, Pons J, Parella T, Font-Bardia M, Calvet T, Ros J. Variable Coordination Behavior of New Hybrid Pyrazole Ligand: Synthesis and Characterization of Several ZnII, CdII, HgII, PdII, PtII, and NiII Complexes. Inorg Chem 2009; 48:8736-50. [DOI: 10.1021/ic900908n] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Mercè Font-Bardia
- Cristal·lografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain
| | - Teresa Calvet
- Cristal·lografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain
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Pons J, García-Antón J, Font-Bardia M, Calvet T, Ros J. Coordination compounds of Cd(II) with several bidentate-NN′ and tridentate-NN′N nitrogen donor ligands. 113Cd NMR studies of monomeric compounds containing nitrogen donor atoms. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.12.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Kaim W, Titze C, Schurr T, Sieger M, Lawson M, Jordanov J, Rojas D, García AM, Manzur J. Reactivity of Copper(I) Complexes with Tripodal Ligands towards O2: Structures of a Precursor [L3CuI(NCCH3)](BF4), L3 = Tris(3-isopropyl-4,5-trimethylenepyrazolyl)methane and of its Oxidation Product [L3CuII(μ-OH)2CuIIL3](BF4)2 with Strong Antiferromagnetic Spin-Spin Coupling. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200500053] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bigmore HR, Lawrence SC, Mountford P, Tredget CS. Coordination, organometallic and related chemistry of tris(pyrazolyl)methane ligands. Dalton Trans 2005:635-51. [PMID: 15702171 DOI: 10.1039/b413121e] [Citation(s) in RCA: 229] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tris(pyrazolyl)methanes are the neutral analogues of the widely exploited and highly useful tris(pyrazolyl)hydroborates, yet by comparison with their boron based counterparts their chemistry is underdeveloped. Recent breakthroughs in the synthesis of ring-substituted tris(pyrazolyl)methanes offer the opportunity for the development of this useful and promising class of ligand. This review summarises the current state of the coordination and organometallic chemistry of tris(pyrazolyl)methanes and highlights areas in which development is likely to occur.
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Affiliation(s)
- Helen R Bigmore
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
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Cingolani A, Martini D, Marchetti F, Pettinari C, Ricciutelli M, Skelton BW, White AH. Synthesis, spectroscopic and structural characterisation of Cd(II) and Zn(II) derivatives of tris(3,4,5-trimethylpyrazol-1-yl)methane. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(03)00111-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Reger DL, Semeniuc RF, Silaghi-Dumitrescu I, Smith MD. Influences of changes in multitopic tris(pyrazolyl)methane ligand topology on silver(I) supramolecular structures. Inorg Chem 2003; 42:3751-64. [PMID: 12793811 DOI: 10.1021/ic034039r] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions between silver tetrafluoroborate and the ligands 1,2,4,5-C(6)H(2)[CH(2)OCH(2)C(pz)(3)](4) (L1, pz = pyrazolyl ring), o-C(6)H(4)[CH(2)OCH(2)C(pz)(3)](2) (L2), and m-C(6)H(4)[CH(2)OCH(2)C(pz)(3)](2) (L3) yield coordination polymers of the formula (C(6)H(6)(-)(n)[CH(2)OCH(2)C(pz)(3)](n)(AgBF4)(m))( infinity ) (n = 4, m = 2, 1; n = 2, ortho substitution, m = 1, 2; meta substitution, m = 2, 3). In the solid state, L2 molecules dimerize by a pair of C-H.pi interactions, forming an arrangement that resembles the tetratopic ligand L1. In the solid-state structure of 1, each silver atom is kappa(2)-bonded to two tris(pyrazolyl)methane units from different ligands with the overall structure a polymer made up from 32-atom macrocyclic rings formed by bonding tris(pyrazolyl)methane groups from nonadjacent positions on the central arene rings to the same two silver atoms. In 2, each silver is bonded to two tris(pyrazolyl)methane units in the same kappa(2)-kappa(2) fashion as with 1, forming a polymer chain. The chains are organized into dimeric units by strong face-to-face pi-pi stacking between the central arene rings making bitopic L2 act as half of tetratopic L1. The chains in both structures are organized by weak C-H.F hydrogen bonds and pi-pi stacking interactions into very similar 3D supramolecular architectures. The structure of 3 contains three types of silvers with the overall 3D supramolecular sinusoidal structure comprised of 32-atom macrocycles. Infrared studies confirm the importance of the noncovalent interactions. Calculations at the DFT (B3LYP/6-31G) level of theory have been carried out on L2 and also support C-H.pi interactions. Electrospray mass spectral data collected from acetone or acetonitrile show the presence of aggregated species such as [(L)Ag(2)(BF(4))](+) and [(L)Ag(2)](2+), despite the fact that (1)H NMR spectra of all compounds show that acetonitrile completely displaces the ligand whereas acetone does not.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. Reger@ mail.chem.sc.edu
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Reger DL, Semeniuc RF, Smith MD. Structurally adaptive multitopic ligands containing tris(pyrazolyl)methane units as supramolecular synthons: manganese carbonyl complexes. J Organomet Chem 2003. [DOI: 10.1016/s0022-328x(02)02043-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rhenium tricarbonyl complexes of tris(pyrazolyl)methane ligands: first structural characterization of an isomer pair of tris(pyrazolyl)methane derivatives and the supramolecular structure of the homobimetallic complex {1,4-C6H4[CH2OCH2C(pz)3]2[Re(CO)3]2}(Br)2. J Organomet Chem 2002. [DOI: 10.1016/s0022-328x(02)01620-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Reger DL, Wright TD, Smith MD, Rheingold AL, Kassel S, Concolino T, Rhagitan B. Syntheses and structures of mono-thiocyanate complexes of cadmium(II) and lead(II) containing bulky nitrogen based polydentate ligands. Polyhedron 2002. [DOI: 10.1016/s0277-5387(02)01058-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Lipton AS, Wright TA, Bowman MK, Reger DL, Ellis PD. Solid-state (67)zn NMR spectroscopy in bioinorganic chemistry. Spectra of four- and six-coordinate zinc pyrazolylborate complexes obtained by management of proton relaxation rates with a paramagnetic dopant. J Am Chem Soc 2002; 124:5850-60. [PMID: 12010060 DOI: 10.1021/ja0127133] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solid-state (67)Zn NMR spectra of model compounds for metalloproteins, such as [H(2)B(3,5-Me(2)pz)(2)](2)Zn (pz denotes pyrazolyl ring), have been obtained using low temperatures (10 K) to enhance the Boltzmann factor in combination with cross polarization (CP) from (1)H to (67)Zn. Attempts to observe spectra of other model compounds, such as [H(2)B(pz)(2)](2)Zn, were hindered by long relaxation times of the protons. To decrease the proton relaxation times, the high-spin six-coordinate complex [HB(3,4,5-Me(3)pz)(3)](2)Fe has been investigated as a dopant. NMR and EPR measurements have shown that this Fe(II) dopant effectively reduces the (1)H spin lattice relaxation time, T(1), of the zinc samples in the temperature range 5-10 K with minimal perturbations of the (1)H spin lattice relaxation time in the rotating frame, T(1)(rho). Using this methodology, we have determined the (67)Zn NMR parameters of four- and six-coordinate zinc(II) poly(pyrazolyl)borate complexes that are useful models for systems of biological importance. The (67)Zn NMR parameters are contrasted to the corresponding changes in the (113)Cd NMR parameters for the analogous compounds. Further, these investigations have demonstrated that a temperature-dependent phase transition occurs in the neighborhood of 185 K for [HB(3,5-Me(2)pz)(3)](2)Zn; the other poly(pyrazolyl)borate complexes we investigated did not show this temperature-dependent behavior. This conclusion is confirmed by a combination of room-temperature high-field (18.8 T) solid-state (67)Zn NMR spectroscopy and low-temperature X-ray methods. The utilization of paramagnetic dopants should enable low-temperature cross polarization experiments to be performed on a wide variety of nuclides that are important in bioinorganic chemistry, for example, (25)Mg, (43)Ca, and (67)Zn.
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Affiliation(s)
- Andrew S Lipton
- Macromolecular Structure & Dynamics Directorate, WR Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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Reger DL, Wright TD, Smith MD. Mixed-ligand complexes of cadmium(II) containing bulky polydentate nitrogen-based ligands. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)00735-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reger DL, Semeniuc RF, Smith MD. Self-assembly of an organometallic silver(I) 1D architecture supported by three different types of bonding interactions. INORG CHEM COMMUN 2002. [DOI: 10.1016/s1387-7003(02)00374-x] [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]
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Reger D, Semeniuc R, Smith M. Self-Assembly of a Chiral Three Dimensional Architecture Composed of Two Different Silver(I) Helical Chains Connected by Bitopic Tris(pyrazolyl)methane Ligands. Eur J Inorg Chem 2002. [DOI: 10.1002/1099-0682(200203)2002:3<543::aid-ejic543>3.0.co;2-2] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Reger DL, Little CA, Smith MD, Rheingold AL, Liable-Sands LM, Yap GPA, Guzei IA. Syntheses and solid state structures of tris(pyrazolyl)methane complexes of sodium, potassium, calcium, and strontium: comparison of structures with analogous complexes of lead(II). Inorg Chem 2002; 41:19-27. [PMID: 11782139 DOI: 10.1021/ic010690n] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of NaI with 2 equiv of HC(pz)(3) or HC(3,5-Me(2)pz)(3) (pz = pyrazolyl ring) leads to the formation of [[HC(pz)(3)](2)Na](I) (1) and [[HC(3,5-Me(2)pz)(3)](2)Na](I) (2), respectively. Both compounds have trigonally distorted octahedral arrangements about the sodium. A similar reaction of KPF(6) with HC(3,5-Me(2)pz)(3) results in the formation of [[HC(3,5-Me(2)pz)(3)](2)K](PF(6)) (3), a complex also shown crystallographically to have a trigonally distorted octahedral arrangement about the potassium, which is an unusually low coordination number for this large metal ion. The complex [[HC(pz)(3)](2)Sr](BF(4))(2) (4) forms in the reaction of Sr(acac)(2) (acac = acetylacetonate) with HBF(4).Et(2)O followed by 2 equiv of HC(pz)(3). The structure is highly distorted, showing kappa(3) bonding of both tris(pyrazolyl)methane ligands and, in addition, interactions with the metal from three fluorine atoms from the BF(4)(-) counterions. The symmetrical structure of 1 and the nine-coordinate structure of 4 are both very different from the distorted, six-coordinate structure [[HC(pz)(3)](2)Pb](BF(4))(2), indicating that for this compound the lone pair on lead(II) is influencing the structure. The reaction of M(acac)(2) (M = Sr, Ca) with H[B[3,5-(CF(3))(2)C(6)H(3)](4)] followed by 2 equiv of HC(pz)(3) produces [[HC(pz)(3)](2)(Hacac)Sr][B[3,5-(CF(3))(2)C(6)H(3)](4)](2) (5) (when the reaction is done in CH(2)Cl(2)), [[HC(pz)(3)](2)(Me(2)CO)(2)Sr][B[3,5-(CF(3))(2)C(6)H(3)](4)](2) (6) (when the reaction is done in acetone), and [[HC(pz)(3)](2)(Hacac)Ca][B[3,5-(CF(3))(2)C(6)H(3)](4)](2)(7), respectively. The structures of all three complexes show a distorted eight-coordinate arrangement of the ligands about the metal. Crystal data: 1 is orthorhombic, Pnma, a = 16.931(1), b = 22.368(3), c = 7.937(2) A, alpha = 90, beta = 90, gamma = 90 degrees, Z = 4; 2 is trigonal, R3, a = 10.7483(8), b = 10.7483(8), c = 35.395(4) A, alpha = 90, beta = 90, gamma = 120 degrees, Z = 3; 3 is monoclinic, P2(1)/c, a = 9.144(4), b = 13.377(6), c = 15.988(7) A, alpha = 90, beta = 92.291(10), gamma = 90 degrees, Z = 2; 4 is hexagonal, P6(5), a = 9.42530(10), b = 9.42530(10), c = 55.3713(5) A, alpha = 90, beta = 90, gamma = 120 degrees, Z = 6; 5 is monoclinic, P2/n, a = 14.1601(3), b = 13.1756(3), c = 27.1826(6) A, alpha = 90, beta = 90.1744(7), gamma = 90 degrees, Z = 2; 6 is monoclinic, P2/n, a = 14.2709(7), b = 13.2646(7), c = 27.4189(13) A, alpha = 90, beta = 90.3850(10), gamma = 90 degrees, Z = 2; 7 is monoclinic, P2/n, a = 14.2388(2), b = 13.1919(2), c = 26.7879(3) A, alpha = 90, beta = 90.0650(8), gamma = 90 degrees, Z = 2.
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Affiliation(s)
- Daniel L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia 29208, USA.
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Reger DL, Wright TD, Semeniuc RF, Grattan TC, Smith MD. Supramolecular structures of cadmium(II) coordination polymers: a new class of ligands formed by linking tripodal tris(pyrazolyl)methane units. Inorg Chem 2001; 40:6212-9. [PMID: 11703122 DOI: 10.1021/ic010574k] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The new ligands C(6)H(4)[CH(2)OCH(2)C(pz)(3)](2) (pz = pyrazolyl ring), 1 (ortho), 2 (meta), and 3 (para), that can potentially bond two or more metal centers were obtained in a single step from the reaction of the appropriate dibromoxylene, 2 equiv of tris-2,2,2-(1-pyrazolyl)ethanol, and excess NaH. Although the arrangement of the tris(pyrazolyl)methane units in the solid-state structures of 1 and 3 are similar, the orientation of these groups with respect to the phenyl ring are different, with 1 showing a twisted structure and 3 a stepped structure. The reaction of [Cd(2)(THF)(5)][BF(4)](4) with the appropriate ligand yields each of the three coordination polymers of the formula [C(6)H(4)[CH(2)OCH(2)C(pz)(3)](2)Cd](BF(4))(2)](n), 4 (ortho), 5 (meta), and 6 (para). In the solid-state structures of all three each tris(pyrazolyl)methane unit is tridentate, with each ligand bonded to two different cadmium(II) atoms, forming a coordination polymer containing 6-coordinate, pseudooctahedral cadmium(II) centers. Polymers 4 and 5 form wavelike chains whereas 6 is arranged in a stepped structure similar to the free ligand. The different connecting patterns of each ligand lead to very different supramolecular structures, structures organized by the BF(4)(-) groups through weak C-H...F hydrogen bonds. Crystallographic information: 1 is monoclinic, P2(1)/n, a = 16.3157(13) A, b = 8.5880(6) A, c = 21.9227(17) A, alpha = gamma = 90 degrees, beta = 100.134(2) degrees, Z = 4; 3 is monoclinic, P2(1)/n, a = 9.1965(9) A, b = 12.9185(12) A, c = 12.7306(12) A, alpha = gamma = 90 degrees, beta = 104.099(2) degrees, Z = 2; 4 is triclinic, P1, a = 10.7877(19) A, b = 12.582(2) A, c = 15.409(3) A, alpha =103.860(4) degrees, beta = 94.123(4) degrees, gamma = 92.573(4) degrees, Z = 2; 6 is monoclinic, C2/c, a = 23.023(3) A, b = 12.2588(14) A, c = 18.119(2) A, alpha = gamma = 90 degrees, beta = 121.281(2) degrees, Z = 4.
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Affiliation(s)
- D L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
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Morales D, Pérez J, Riera L, Riera V, Miguel D. Molybdenum and Tungsten Tricarbonyl Complexes with the Tripodal Ligands [nBuSn(2-pyridyl)3] and [RSn(methylthiomethyl)3]. Organometallics 2001. [DOI: 10.1021/om0104722] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dolores Morales
- Departamento de Química Orgánica e Inorgánica /IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain
| | - Julio Pérez
- Departamento de Química Orgánica e Inorgánica /IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain
| | - Lucía Riera
- Departamento de Química Orgánica e Inorgánica /IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain
| | - Víctor Riera
- Departamento de Química Orgánica e Inorgánica /IUQOEM, Facultad de Química, Universidad de Oviedo-CSIC, 33071 Oviedo, Spain
| | - Daniel Miguel
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
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Reger DL, Wright TD, Little CA, Lamba JJ, Smith MD. Control of the stereochemical impact of the lone pair in lead(II) tris(pyrazolyl)methane complexes. Improved preparation of Na[B[3,5-(CF3)2C6H3]4]. Inorg Chem 2001; 40:3810-4. [PMID: 11442381 DOI: 10.1021/ic0100121] [Citation(s) in RCA: 127] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of Pb(acac)2 with 2 equiv of [H(Et2O)2][B[3,5-(CF3)2C6H3]4] (HBAr(f)) in CH2Cl2 followed by addition of 2 equiv of either HC(pz)3 or HC(3,5-Me2pz)3 (pz = pyrazolyl ring) leads to the formation of [Pb[HC(pz)3]2][B[3,5-(CF3)2C6H3]4]2 (1) and [Pb[HC(3,5-Me2pz)3]2][B[3,5-(CF3)2C6H3]4]2 (2), respectively. The cation in 1 has a distorted octahedral structure with a stereochemically active lone pair on lead(II). In contrast, the cation in 2 is trigonally distorted octahedral with the lone pair on the lead(II) clearly stereochemically inactive. The driving force for this cation to have a stereochemically inactive lone pair is that in this geometric arrangement the interligand distances between adjacent 3-position methyl groups are close to 4.0 A, the sum of the van der Waals radii of two methyl groups. To facilitate this chemistry, the synthesis of Na[B[3,5-(CF3)2C6H3]4], needed to prepare HBAr(f), has been dramatically improved. The main change is to add NaBF4 to the reaction mixture before forming the Grignard from the reaction of magnesium and 3,5-(CF3)2C6H3Br. The Grignard reacts with the NaBF4 as it forms, reducing the danger of explosion and leading to a higher isolated yield of the product. Crystallographic information: 1 is triclinic, P1, a = 13.0133(6) A, b = 17.2210(7) A, c = 24.7634(11) A, alpha = 71.7300(10) degrees, beta = 82.3630(10) degrees, gamma = 70.5120(10) degrees, Z = 2; 2 is triclinic, P1, a = 12.756(4) A, b = 13.469(4) A, c = 17.160(5) A, alpha = 82.454(7) degrees, beta = 89.904(8) degrees, gamma = 72.995(7) degrees, Z = 1.
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Affiliation(s)
- D L Reger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
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Reger DL, Little CA, Young VG, Pink M. Variable-Temperature X-ray Structural Investigation of {Fe[HC(3,5-Me2pz)3]2}(BF4)2(pz = Pyrazolyl Ring): Observation of a Thermally Induced Spin State Change from All High Spin to an Equal High Spin-Low Spin Mixture, Concomitant with the Onset of Nonmerohedral Twinning. Inorg Chem 2001; 40:2870-4. [PMID: 11375706 DOI: 10.1021/ic010056+] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complex [Fe[HC(3,5-Me(2)pz)(3)](2)](BF(4))(2) (pz = pyrazolyl ring) undergoes a phase transition that occurs concomitantly with a thermally induced spin conversion between the high-spin (HS, S = 2) and low-spin (LS, S = 0) states. Above 204 K the compound is completely HS with the structure in the C2/c space group with Z = 4. A crystal structure determination of this phase was performed at 220 K yielding the cell constants a = 20.338(2) A, b = 10.332(1) A, c = 19.644(2) A, beta = 111.097(2) degrees, and V = 3851.5(6) A(3). There is one unique iron(II) site at this temperature. Below 206 K the compound converts to a 50:50 mixture of HS and LS. The radical change in the coordination sphere for half of the iron(II) sites, most notably a shortening of the Fe-N bond distances by ca. 0.2 A, that accompanies this magnetic transition causes a phase transition. The crystal system changes from C-centered monoclinic to primitive triclinic with Z = 2 with two half-molecules on independent inversion centers. A crystal structure determination was performed at 173 K in space group P1 with a = 10.287(2) A, b = 11.355(3) A, c = 18.949(4) A, alpha = 90.852(4) degrees, beta = 105.245(4) degrees, gamma = 116.304(4) degrees, and V = 1892.3(8) A(3). All specimens investigated below the phase transition temperature were determined to be nonmerohedral twins. Temperature cycling between these two forms does not appear to degrade crystal quality. Previous magnetic susceptibility measurements indicate a second, irreversible increase in the magnetic moment the first time the crystals are cooled below 85 K. A crystal structure determination at 220 K of a specimen precooled to 78 K was not significantly different from those not cooled below 220 K.
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Affiliation(s)
- D L Reger
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Reger* DL, Little CA, Rheingold AL, Sommer R, Long* GJ. Synthesis, solid-state structure, magnetic properties and Mössbauer spectral studies of {Fe[HC(3,5-Me2pz)3](H2O)3}(BF4)2. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00381-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Reger DL, Little CA, Rheingold AL, Lam M, Liable-Sands LM, Rhagitan B, Concolino T, Mohan A, Long GJ, Briois V, Grandjean F. A synthetic, structural, magnetic, and spectral study of several [Fe[tris(pyrazolyl)methane]2](BF4)2 complexes: observation of an unusual spin-state crossover. Inorg Chem 2001; 40:1508-20. [PMID: 11261958 DOI: 10.1021/ic001102t] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complexes [Fe[HC(3,5-Me2pz)3]2](BF4)2 (1), [Fe[HC(pz)3]2](BF4)2 (2), and [Fe[PhC(pz)2(py)]2](BF4)2 (3) (pz = 1-pyrazolyl ring, py = pyridyl ring) have been synthesized by the reaction of the appropriate ligand with Fe(BF4)2.6H2O. Complex 1 is high-spin in the solid state and in solution at 298 K. In the solid phase, it undergoes a decrease in magnetic moment at lower temperatures, changing at ca. 206 K to a mixture of high-spin and low-spin forms, a spin-state mixture that does not change upon subsequent cooling to 5 K. Crystallographically, there is only one iron(II) site in the ambient-temperature solid-state structure, a structure that clearly shows the complex is high-spin. Mössbauer spectral studies show conclusively that the magnetic moment change observed at lower temperatures arises from the complex changing from a high-spin state at higher temperatures to a 50:50 mixture of high-spin and low-spin states at lower temperatures. Complexes 2 and 3 are low-spin in the solid phase at room temperature. Complex 2 in the solid phase gradually changes over to the high-spin state upon heating above 295 K and is completely high-spin at ca. 470 K. In solution, variable-temperature 1H NMR spectra of 2 show both high-spin and low-spin forms are present, with the percentage of the paramagnetic form increasing as the temperature increases. Complex 3 is low-spin at all temperatures studied in both the solid phase and solution. An X-ray absorption spectral study has been undertaken to investigate the electronic spin states of [Fe[HC(3,5-Me2pz)3]2](BF4)2 and [Fe[HC(pz)3]2](BF4)2. Crystallographic information: 2 is monoclinic, P2(1)/n, a = 10.1891(2) A, b = 7.6223(2) A, c = 17.2411(4) A, beta = 100.7733(12) degrees, Z = 2; 3 is triclinic, P1, a = 12.4769(2) A, b = 12.7449(2) A, c = 13.0215(2) A, alpha = 83.0105(8) degrees, beta = 84.5554(7) degrees, gamma = 62.5797(2) degrees, Z = 2.
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Affiliation(s)
- D L Reger
- Institut de Physique, B5, Université de Liège, B-4000 Sart-Tilman, Belgium
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Pettinari C, Pellei M, Cingolani A, Martini D, Drozdov A, Troyanov S, Panzeri W, Mele A. Synthesis, Spectroscopic, and X-ray Diffraction Structural Studies of Tin(IV) Derivatives with Tris(pyrazol-1-yl)methanes. Inorg Chem 1999. [DOI: 10.1021/ic9906252] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Pettinari
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - M. Pellei
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - A. Cingolani
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - D. Martini
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - A. Drozdov
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - S. Troyanov
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - W. Panzeri
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - A. Mele
- Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, via S. Agostino 1, I-62032 Camerino, Macerata, Italy, Department of Chemistry, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia, and Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
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Synthesis, structures and electrochemical properties of VIB carbonyl complexes containing bis(4-halopyrazol-1-yl)alkanes. Polyhedron 1999. [DOI: 10.1016/s0277-5387(99)00142-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Reger DL, Collins JE, Rheingold AL, Liable-Sands LM. Solid State Structure of {[HC(3,5-Me2pz)3][HB(3,5-Me2pz)3]Cd}{B[3,5-(CF3)2C6H3]4}: Comparison of the Bonding of Tris(pyrazolyl)methane and Tris(pyrazolyl)borate Ligands. Inorg Chem 1999. [DOI: 10.1021/ic981453w] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Reger DL. Tris(Pyrazolyl)Methane Ligands: The Neutral Analogs of Tris(Pyrazolyl)Borate Ligands. COMMENT INORG CHEM 1999. [DOI: 10.1080/02603599908020413] [Citation(s) in RCA: 109] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Coordination geometries for palladium and platinum: theoretical studies and the synthesis and structure of tris(indazol-1-yl)borate complexes MMe3{(ind)3BH}. Inorganica Chim Acta 1999. [DOI: 10.1016/s0020-1693(98)00402-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kuang SM, Zhang ZZ, Wang QG, Mak TC. Reaction of [Cu2(μ-Ph2Ppypz)2(MeCN)2](ClO4)2 (Ph2Ppypz=(2-diphenylphosphino-6-pyrazol-1-yl)pyridine) with Fe(CO)42− and X− (X=Cl, I, MeCO2 and pyrazolate). J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(98)00418-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pettinari C, Marchetti F, Cingolani A, Troyanov S, Drozdov A. Ligation properties of N-substituted imidazoles: synthesis, spectroscopic and structural investigation, and behaviour in solution of zinc(II) and cadmium(II) complexes. Polyhedron 1998. [DOI: 10.1016/s0277-5387(97)00455-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lobbia GG, Bovio B, Santini C, Cecchi P, Pettinari C, Marchetti F. Tris(4-bromo-1H-pyrazol-1-yl)borato derivatives of first-row transition and group 12 and 14 metals. X-ray crystal structure of [HB(4-Brpz)3]2 Cd. 113Cd solution NMR study of bis[poly(pyrazolyl)borato]cadmium complexes. Polyhedron 1998. [DOI: 10.1016/s0277-5387(97)00271-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reger DL, Collins JE, Matthews MA, Rheingold AL, Liable-Sands LM, Guzei IA. Stabilization of Lithium Borohydride with Nitrogen Donor, Chelating Ligands. Syntheses and Solid State Structures of [HC(3,5-Me2pz)3]Li(η3-BH4), {[H2C(3,5-Me2pz)2]Li(μ-η3-BH4)}2, and {[4,4‘-Me2bipy]Li(μ-η3-BH4)}2 (pz = pyrazolyl, bipy = bipyridyl). Inorg Chem 1997. [DOI: 10.1021/ic970815h] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Michael A. Matthews
- Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina 29208
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Frohnapfel DS, White PS, Templeton JL, Rüegger H, Pregosin PS. Orientational and Stereochemical Preferences in [Hydridotris(3,5-dimethyl-1-pyrazolyl)borato](CO)2W(η3-allyl) Complexes. Organometallics 1997. [DOI: 10.1021/om970074s] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Reger DL, Collins JE, Rheingold AL, Liable-Sands LM, Yap GPA. Syntheses and Characterization of Cationic (Tris(pyrazolyl)methane)silver(I) Complexes. Solid-State Structures of {[HC(3,5-Me2pz)3]2Ag}(O3SCF3), {[HC(3-Butpz)3]Ag}(O3SCF3), and {[HC(3-Butpz)3]Ag(CNBut)}(O3SCF3). Organometallics 1997. [DOI: 10.1021/om960481o] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Reger DL, Collins JE, Rheingold AL, Liable-Sands LM, Yap GPA. Syntheses of Cationic Lead(II) and Tin(II) Complexes Containing Tris(pyrazolyl)methane Ligands. Control of Stereochemistry by Variation in Ligand Substitution. Inorg Chem 1997. [DOI: 10.1021/ic961030z] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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