Pyridinetrihalogenometallate anions, pyMX<sub>3</sub><sup>–</sup>, of cobalt(<scp>II</scp>), nickel(<scp>II</scp>), and zinc(<scp>II</scp>)

Brown, D. H.; Forrest, K. P.; Nuttall, R. H.; Sharp, D. W. A.

doi:10.1039/j19680002146

Cited by 23 publications

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“…Here apparently compounds of divalent nickel octahedrally coordinated with d8-electron configuration can be considered. The tetrafluorinenickelates of potassium, rubidium, ammonium, and thallium (Tit) are tetragonal [28], Li,NiF, is cubic [29] and BaNiF, orthorhombic [30]. These compounds are antiferromagnetic showing room temperature moments around 2 .…”

Section: Compounds With Two Electrons On a Doubly Degenerate Orbitalmentioning

confidence: 99%

Analysis of charge—orbital ordering in compounds with mixed valence

Ionova¹,

Makarov²,

Pachev³

et al. 1978

Physica Status Solidi (b)

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Analysis of Charge-Orbital Ordering in Compoundswith Mixed Valence BY G. V. IONOVA (a) , E. P. MAHAROV (b), 0. M. PACHEV (b), and 5. P. IONOV (c) Orbital and charge ordering in transition element compounds are considered and a theoretical model is established. Special emphasis is given to the divalent compounds of Cu2+, Ag2', Au2+ and the trivalent compounds of Pd3+ and Pt3+. It is shown that spatial orbital ordering takes place in cornpounds with strong intracentre correlations (Cut+, &2+, Mn3+) and that strong intercentre correlation results in charge ordering on orbitals or centres (Ag2+, Au2+, Pd3+, and Pt3+). Real systems and lattice distortions caused by spatial and charge ordering are discussed. B cTaTbe paccMoTpeHo Op6HTaJIbHOe M a a p~n o~o e ynopHnosesHe B coemiHeHmx nepe-XOLIHbIX 3JIeMeHTOB H 06cyxneaa TeOpeTH9eCKaH MOaeJIb TaKOrO yIlOpHHOseHElH. Oco6oe BHHMaHMe YHeJIHeTCH LIByXBaJIeHTHbIM COeHHHeHBHM cUZt, Ag2+ H AU2' a TaKlfEe TpeX-BaJIeHTHblM COeAMHeHkl HM Pd3+ H pt3+. nOKa3aH0, 9TO B COeAHHeHHH C CBJIbHbIMH OHHO-UeHTPOBbIMH KOppeJIH4HfiMH (CU", Cr2+ H MnS+) MOWeT H M W b MeCTO IlpOCTpaHCTBeHHOe ynOpHHOYeHI?e nbIpO9HblX Op6MTaJIefi (dzz-z2 I.I dZaPy:), a B COeLIkiHeHMHX C CElJIbHbIMA ABYXUeHTPOBbIMH KOppeJIHUHHMH (Ag2+, AU", Pda+ M Pt3+) HMeeT MeCTO 3apHJlOBOe LICKPlfEeHAH B HHX, 06yCJIOBJIeHHbIe npOCTpaHCTBeHHblM I? 3apHHOBbIM ynOpHHO9eHHeM.ynopmoseHMe Ha UeHTpax w op6n~ax. 0 6 c y m n a m~c~ peamHwe cmTeMbI M pellreTosHbIe

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Section: Compounds With Two Electrons On a Doubly Degenerate Orbitalmentioning

confidence: 99%

Analysis of charge—orbital ordering in compounds with mixed valence

Ionova¹,

Makarov²,

Pachev³

et al. 1978

Physica Status Solidi (b)

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Coordination Chemistry of Acrylamide. 6 Synthesis and Coordination Compounds of N‐Pyrazolylpropanamide – a Versatile Acrylamide‐derived Ligand

Girma

Lorenz

Blaurock

et al. 2007

Zeitschrift anorg allge chemie

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The syntheses, spectroscopy and single crystal X-ray structures of the multifunctional acrylamide-derived ligand N-pyrazolylpropanamide (ϭ L) (1), and its complexes [L 2 CuCl 2 ] (2) and [L 4 Co 3 Cl 6 ] (3) with copper(II) and cobalt(II) chlorides, respectively, are described. The ligand 1 is easily obtained in one step by the reaction of pyrazole with acrylamide in a 1:1 molar ratio in the presence of trimethylbenzylammonium hydroxide as a basic catalyst. The reaction of CuCl 2 · 2H 2 O with 1 in a 1:2 metal salt:ligand molar ratio in ethanol/-triethylorthoformate solution gave coordination compound 2. The crystal structure of 2 contains two sevenmembered chelate rings formed by two nitrogen atoms of the pyrazolyl groups and two weakly coordinated carbonyl oxygen atoms Materials. Acrylamide, pyrazole, trimethylbenzylammonium hydroxide (Triton B, 40 % in methanol), copper(II)chloride dihydrate, cobalt(II)chloride hexahydrate, triethylorthoformate (for dehydration), acetonitrile (99 %) and absolute ethanol were all obtained from commercial suppliers and used as received.Physical Methods. Microanalyses of the compounds were performed using a Leco CHNS 923 apparatus. Melting points were

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67h6 - 68z5

König¹,

König²

Magnetic Properties of Coordination and Organometallic Transition Metal Compounds

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Pyridinetrihalogenometallate anions, pyMX₃^–, of cobalt(II), nickel(II), and zinc(II)

Cited by 23 publications

References 0 publications

Analysis of charge—orbital ordering in compounds with mixed valence

Analysis of charge—orbital ordering in compounds with mixed valence

Coordination Chemistry of Acrylamide. 6 Synthesis and Coordination Compounds of N‐Pyrazolylpropanamide – a Versatile Acrylamide‐derived Ligand

67h6 - 68z5

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Pyridinetrihalogenometallate anions, pyMX3–, of cobalt(II), nickel(II), and zinc(II)

Cited by 23 publications

References 0 publications

Analysis of charge—orbital ordering in compounds with mixed valence

Analysis of charge—orbital ordering in compounds with mixed valence

Coordination Chemistry of Acrylamide. 6 Synthesis and Coordination Compounds of N‐Pyrazolylpropanamide – a Versatile Acrylamide‐derived Ligand

67h6 - 68z5

Contact Info

Product

Resources

About

Pyridinetrihalogenometallate anions, pyMX₃^–, of cobalt(II), nickel(II), and zinc(II)