scholarly journals Crystal Structures and Magnetic Properties of Two New Cobalt(II) Complexes with Triazole-Substituted Nitronyl and Imino Nitroxide Radicals

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jing Chen ◽  
You-Juan Zhang ◽  
Kun-Tao Huang ◽  
Qiang Huang ◽  
Jun-Jie Wang
Keyword(s):  
Magnetic Properties ◽  
Metal Ions ◽  
Crystal Structures ◽  
Magnetic Measurements ◽  
Nitroxide Radicals ◽  
Triclinic Space Group ◽  
Space Group ◽  
Imino Nitroxide

Two new cobalt(II) complexes of formula [Co(hfac)2(NITphtrz) 1 and Co(hfac)2(IMphtrz) 2] have been prepared and characterized structurally [where NITphtrz = 4,4,5,5-tetramethyl-2-(2-phenyl-1,2,3-triazole-4-yl)imidazoline-1-oxyl-3-oxide and IMphtrz = 4,4,5,5-tetramethyl-2-(2-phenyl-1,2,3-triazole-4-yl)imidazoline-1-oxyl]. All of the complexes crystallize in an isomorphous triclinic space group P1- with the Co(II) ion octahedrally coordinated via the bidentate chelating mode. The magnetic measurements show that two complexes exhibit antiferromagnetic interactions between the metal ions and the nitroxide radicals.

scholarly journals First coordination compounds based on a bis(imino nitroxide) biradical and 4f metal ions: synthesis, crystal structures and magnetic properties

2016 ◽  
Vol 45 (7) ◽  
pp. 2936-2944 ◽  
Author(s):  
Samira G. Reis ◽  
Matteo Briganti ◽  
Daniel O. T. A. Martins ◽  
Handan Akpinar ◽  
Sergiu Calancea ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metal Ions ◽  
Crystal Structures ◽  
Coordination Compounds ◽  
Imino Nitroxide

The synthesis, structure and magnetic properties of lanthanide-biradical complexes are reported.

Two new one-dimensional coordination polymers containing [N(CN)2]– — Syntheses, structures, and magnetic properties of [MII(3- Bzpy)2(N(CN)2)2] (M = Mn (1) and Co (2) and 3-Bzpy = 3-benzoylpyridine)

2012 ◽  
Vol 90 (4) ◽  
pp. 362-367
Author(s):  
Qianqian Bao ◽  
Yutao Ma ◽  
Qihua Zhao ◽  
Yanghui Luo ◽  
Baiwang Sun
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Metal Ions ◽  
Coordination Polymers ◽  
Magnetic Measurements ◽  
Coordination Complexes ◽  
Space Group ◽  
One Dimensional

The structures of two one-dimensional coordination complexes, [MII(3-Bzpy)2(N(CN)2)2] (M = Mn (1) and Co (2) and 3-Bzpy = 3-benzoylpyridine), have been determined in this work. The two structures are isomorphous, crystallize in a monoclinic P21/c space group, and show almost the same crystal structure. The magnetic measurements of the two compounds (2–300 K) indicate that antiferromagnetic exchanges exist between the metal ions of the two compounds.

Synthesis and Crystal Structures of Three Carboxylate- Bridged Tetranuclear Copper(II) - Lanthanide(III) Complexes of Ph3P+CH2CH2CO2−

1999 ◽  
Vol 52 (10) ◽  
pp. 983 ◽  
Author(s):  
Yang-Yi Yang ◽  
Seik Weng Ng ◽  
Xiao-Ming Chen
Keyword(s):  
Oxygen Atom ◽  
Crystal Structures ◽  
Triclinic Space Group ◽  
Coordination Environment ◽  
Space Group ◽  
Bond Angles ◽  
Bond Lengths ◽  
Metal Atoms ◽  
Apical Site

Three tetranuclear copper(II)–lanthanide(III) complexes of triphenylphosphoniopropionate (Ph3P+CH2CH2CO2−,tppp), namely [Cu2Ln2(tppp)8(H2O)8](ClO4)10·2H 2 O [Ln = EuIII, NdIII or CeIII], were synthesized and characterized by crystallography. The EuIII complex crystallizes in the triclinic space group P1 – with a 16.249(7), b 17.185(11), c 17.807(11) Å, α 69.750(10), β 89.230(10), γ 84.070(10)˚, V 4639(5) Å3, Z 1. In the crystal structures, four tppp ligands bridge a pair of CuII and tetraaquo-EuIII atoms (Cu···Eu 3.527(2) Å) through their µ2-carboxylato ends to form a dinuclear subunit; two of these subunits are additionally linked by one of the CuII -bonded carboxylato oxygen ends, across a centre of inversion, to furnish a dimeric tetranuclear [Cu(tppp)4 Eu(H2O)4]2 species (Cu···Cu 3.323(2) Å). This CuII -bonded oxygen atom occupies the apical site of the square-pyramidal coordination environment of the CuII atom. The EuIII atom is eight-coordinated in a square-antiprismatic geometry. The NdIII and CeIII complexes are isomorphous to the EuIII complex, and only minor differences in bond lengths and bond angles involving the metal atoms are noted.

Crystal Structures and Magnetic Properties of Hydrogen-Bonded Nitronyl Nitroxide Radicals and Their Metal Complexes

2002 ◽  
Vol 379 (1) ◽  
pp. 153-158 ◽  
Author(s):  
Mikio Ueda ◽  
Tomoyuki Mochida ◽  
Sachie Furukawa ◽  
Hideaki Suzuki ◽  
Hirosi Moriyama ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Nitronyl Nitroxide ◽  
Nitroxide Radicals ◽  
Hydrogen Bonded

Kristallstrukturen, Schwingungsspektren und Normalkoordinatenanalyse von cis-[ReCl4X2]2-, X = NCS, NCSe / Crystal Structures, Vibrational Spectra and Normal Coordinate Analysis of cis-[ReCl4X2]2-, X = NCS, NCSe

1998 ◽  
Vol 53 (11) ◽  
pp. 1329-1334 ◽  
Author(s):  
L. Homolya ◽  
S. Strueß ◽  
W. Preetz
Keyword(s):  
Crystal Structures ◽  
Normal Coordinate Analysis ◽  
X Ray Diffraction ◽  
Normal Coordinate ◽  
Triclinic Space Group ◽  
Valence Force ◽  
Space Group ◽  
X Ray ◽  
Valence Force Field ◽  
Ir And Raman

The crystal structures of cis-(n-Bu4N)2[ReCl4(NCS)2] (triclinic, space group P1̅, a = 11,245( 1), b = 20.174(3), c = 21.320(8) Å, a =109.06(2), β = 96.46(2), γ = 98.22(5)°, Z = 4) and cis-(Ph4P)2[ReCl4(NCSe)2]·2CH2Cl2 (triclinic, space group P1̅, a = 10.341(2), b = 13.436(3), c = 19.616(4) Å, α = 92.70(2), β = 92.02(2), γ = 89.99( 1)°, Z= 2) have been determined by single crystal X-ray diffraction analysis. Both ambidentate ligands NCS and NCSe are bonded via the N atom. Using the molecular parameters of the X-ray determinations the low temperature (10 K) IR and Raman spectra of the (n-Bu4N) salts have been assigned by normal coordinate analysis based on a modified valence force field. The valence force constants fd(ReN) are 1,78(NCS) and 1,79(NCSe) mdyn/ Å.

Mononuclear manganese(iii) complexes with reduced imino nitroxide radicals by single-electron transfer and intermolecular hydrogen bonds as an intramolecular structural driving force

2019 ◽  
Vol 48 (35) ◽  
pp. 13378-13387 ◽  
Author(s):  
Constance Lecourt ◽  
Warren Madanamoothoo ◽  
Vivian Ferreol ◽  
Nicolas Bélanger-Desmarais ◽  
Lhoussain Khrouz ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Driving Force ◽  
Nitroxide Radical ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Nitroxide Radicals ◽  
Intermolecular Hydrogen Bonds ◽  
Imino Nitroxide

One-electron transfer from Mn(ii) ions to an imino nitroxide radical gives mononuclear Mn(iii) complexes of the reduced amino imine-oxide form for which crystal structures evidence hydrogen bonds networks acting as a stabilizing driving-force.

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