Synthesis, Crystal Structure, Spectroscopic and Magnetic Properties of an Unprecedented Three-Dimensional CuII Coordination Compound of 1,2-Bis(1,2,4-triazol-4-yl)ethane

Garcia, Yann; Koningsbruggen, Petra J. van; Kooijman, Huub; Spek, Anthony L.; Haasnoot, Jaap G.; Kahn, Olivier

doi:10.1002/(sici)1099-0682(200003)2000:3<575::aid-ejic575>3.0.co;2-r

Cited by 3 publications

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“…triazole in a N1,N1′ fashion despite the use of the flexible btre ligand that could potentially lead to multidentate coordination as found for [Cu 3 (btre) 5 (H 2 O) 2 ](ClO 4 ) 6 ‚H 2 O. 10 The same coordination mode was found in [M(btr) 2 (NCS) 2 ]‚ H 2 O (M II ) Fe(HS), Fe(LS), Co(HS)), 8,9,25 but the supramolecular organization is different. In [M(btr) 2 (NCS) 2 ]‚H 2 O, the layers are connected by van der Waals forces and weak hydrogen bonds through noncoordinated water molecules.…”

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confidence: 72%

“…The flexibility of btre (1,2-bis(1,2,4-triazol-4-yl)ethane, Scheme 1) allowed the tridentate and tetradentate coordination mode to be observed, for the first time, for a bis-1,2,4-triazole coordination compound. 10 We report here on the crystal structure of the new compounds [M(btre) 2 (NCS) 2 ] with M II ) Fe (1), Co (2) and compare the spectroscopic, structural, and magnetic properties of compound 1 under several perturbations (temperature, pressure, and light irradiation) in the light of the ones of [M(btr) 2 (NCS) 2 ]‚H 2 O with M II ) Fe (3) 8 and Co (4) 11 and [Fe(btr) 2 (NCS) 2 ] (5). 8…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, a flexible network was revealed in the crystal structure of the 3D Cu II coordination polymer, [Cu 3 (btre) 5 (H 2 O) 2 ](ClO 4 ) 6 ·H 2 O, made of trinuclear metallic units interconnected by btre ligands. The flexibility of btre (1,2-bis(1,2,4-triazol-4-yl)ethane, Scheme ) allowed the tridentate and tetradentate coordination mode to be observed, for the first time, for a bis-1,2,4-triazole coordination compound 1 1,2-bis(1,2,4-triazol-4-yl)ethane) (btre) …”

Section: Introductionmentioning

confidence: 99%

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Crystal Structure, Magnetic Properties, and ⁵⁷Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)₂(NCS)₂] (M^II = Fe, Co)

et al. 2005

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New coordination polymers of the formula [M(btre)(2)(NCS)(2)] (btre = 1,2-bis(1,2,4-triazol-4-yl)ethane; M(II) = Fe, Co) have been synthesized, and their crystal structures have been determined at 293 K by X-ray analysis. The Fe(II) compound (C(7)H(8)FeN(7)S(2)) crystallizes in the monoclinic space group P2(1)/n, a = 12.439(5) A, b = 8.941(2) A, c = 9.321(3) A, beta = 90.88(2) degrees , V = 1036.6(6) A(3), Z = 2, 3791 reflections [I > 3sigma(I)], R(F) = 0.036, wR2 = 0.123. The Co(II) compound is isostructural to the Fe(II) compound. The crystal structure consists of a 2D sheet in which the metal ions are linked by bis monodentate (N1, N1') 1,2,4-triazole ligands. The structure is stabilized by pi-bond interactions between two adjacent sheets and by S...S interactions. Temperature-dependent SQUID, (57)Fe Mössbauer, and X-ray diffraction measurements indicate that [Fe(btre)(2)(NCS)(2)] retains a HS ground state upon cooling from 293 K down to 8 K. The surprising absence of spin-crossover behavior for this Fe(II)-1,2,4-triazole polymeric coordination compound that has been confirmed by pressure experiments up to approximately 12 kbar and by light irradiation experiments at 10 K is discussed on the basis of its structural features. Insight into the origin of the cooperative effects of the spin transition in [Fe(btr)(2)(NCS)(2)].H(2)O (btr = 4,4'-bis-1,2,4-triazole) is also given thanks to a re-evaluation of its distortion parameters in the high- and low-spin states.

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confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Crystal Structure, Magnetic Properties, and ⁵⁷Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)₂(NCS)₂] (M^II = Fe, Co)

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“…Many of these ligands lead to multidimensional polynuclear assemblies when they are coordinated to transition metals of the first transition series (3d row). [16][17][18][19] Some of the iron(II) complexes with such ligands exhibit a SCO behavior on cooling to liquid nitrogen temperature. 12,16,18 These SCO properties vary depending both on the length and on the molecular arrangement of the spacer.…”

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New Ditopic and Tripodal 1,2,4-Triazole- and Tetrazole-Based Ligands for Coordination Chemistry

Boland¹,

Hertsens²,

Marchand‐Brynaert³

et al. 2006

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The practical synthesis of two new classes of polytopic azole-based ligands is reported. The synthesis of the precursor amines was achieved by substitution of a leaving group by an azide followed by reduction with triphenylphosphine and water. Another efficient method employs a Mitsunobu coupling with phthalimide allowing the conversion of a primary alcohol into a primary amine. The triazole and tetrazole were obtained by cyclization of these amine precursors. The first family consisted of ditopic ligands containing both 1-R-tetrazole and 4-R-1,2,4-triazole moieties linked by an alkyl spacer, while the second consists of branched ligands with three azole cycles linked to a benzene core through ether bonds. Both classes are suitable for building multidimensional polynuclear coordination assemblies and for the observation of thermal spin state crossover behavior with iron(II) ions.

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“…Most of the transition metal sulfonates previously obtained from aqueous media are aqua-metal sulfonate salts [1]. The Rare Earth sulfonate materials [2] had been proved to be 3D polymers; they are chemically and thermally stable and appropriate for using in heterogeneous catalysis.…”

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Supramolecular interactions in the 2-D coordination polymers: [M(btre)₂(NCS)₂] (M^II= Fe, Co)

Garcia¹,

Gieck²,

Bravic³

et al. 2006

Acta Cryst Sect A

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Synthesis, Crystal Structure, Spectroscopic and Magnetic Properties of an Unprecedented Three-Dimensional CuII Coordination Compound of 1,2-Bis(1,2,4-triazol-4-yl)ethane

Cited by 3 publications

References 41 publications

Crystal Structure, Magnetic Properties, and ⁵⁷Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)₂(NCS)₂] (M^II = Fe, Co)

Crystal Structure, Magnetic Properties, and ⁵⁷Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)₂(NCS)₂] (M^II = Fe, Co)

New Ditopic and Tripodal 1,2,4-Triazole- and Tetrazole-Based Ligands for Coordination Chemistry

Supramolecular interactions in the 2-D coordination polymers: [M(btre)₂(NCS)₂] (M^II= Fe, Co)

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Synthesis, Crystal Structure, Spectroscopic and Magnetic Properties of an Unprecedented Three-Dimensional CuII Coordination Compound of 1,2-Bis(1,2,4-triazol-4-yl)ethane

Cited by 3 publications

References 41 publications

Crystal Structure, Magnetic Properties, and 57Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)2(NCS)2] (MII = Fe, Co)

Crystal Structure, Magnetic Properties, and 57Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)2(NCS)2] (MII = Fe, Co)

New Ditopic and Tripodal 1,2,4-Triazole- and Tetrazole-Based Ligands for Coordination Chemistry

Supramolecular interactions in the 2-D coordination polymers: [M(btre)2(NCS)2] (MII= Fe, Co)

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Crystal Structure, Magnetic Properties, and ⁵⁷Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)₂(NCS)₂] (M^II = Fe, Co)

Crystal Structure, Magnetic Properties, and ⁵⁷Fe Mössbauer Spectroscopy of the Two-Dimensional Coordination Polymers [M(1,2-bis(1,2,4-triazol-4-yl)ethane)₂(NCS)₂] (M^II = Fe, Co)

Supramolecular interactions in the 2-D coordination polymers: [M(btre)₂(NCS)₂] (M^II= Fe, Co)