The crystal structure of copper(II) formate dihydrate

Bukowska-Strzyżewska, M.

doi:10.1107/s0365110x65003456

Cited by 55 publications

(18 citation statements)

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“…Di-and tetrahydrates are known, as well as several modifications of the anhydrous formate (46). Crystal structures have been determined for one form of the anhydrous salt (9) and for the two hydrated formates (14,33,35,54). All three of these materials have polymeric structures with bridging formate ions, although each displays a different mode of linkage.…”

Section: Copper(i1) Formate Adductsmentioning

confidence: 99%

Structure and Metal‐Metal Interactions in Copper(II) Carboxylate Complexes

Doedens

1976

Progress in Inorganic Chemistry

193

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Section: Copper(i1) Formate Adductsmentioning

confidence: 99%

Structure and Metal‐Metal Interactions in Copper(II) Carboxylate Complexes

Doedens

1976

Progress in Inorganic Chemistry

193

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“…Poray-Koshits [17]. In particular, this structural function of the syn-anti-RCOO fragment has been found in the copper formate dihydrate with Cu-O distances of 2.019 and 2.395 Å [18]. The hydrogen bond promotes the formation of an additional pseudo-chelate five-membered ring, Cu(1)N(1)N(2)HO(1)'.…”

Section: The Chains Interact Via the N(3)-h···o(4) Hydrogen Bond (N··mentioning

confidence: 99%

Synthesis and crystal structure of 2′-(3,5-dioxo-1,2,4-triazinane-1-yl)acetic acid and the product of its reaction with copper(II) chloride

et al. 2005

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Semicarbazides and their derivatives are promising ligands for chelate complexation and are often parts of multicomponent organic molecules prepared by template condensations. It was shown [1] that the most important factors for condensation on a metal matrix include the nature of the metal and the reaction medium. This gives systems of various sizes up to macrocycles containing 23 atoms or more [2]. As a result of a template reaction, the metal atom functioning as a matrix is incorporated in the final product. In some known examples, however, the central metal monitors the condensation route or transformations of the starting ligands without inclusion of the template center in the final product. Such processes are known as transit template reactions [1]. For example, the reaction of thiosemicarbazide with benzene in the presence of NaBH 4 gives a cyclic triazine or its dimer [3]. Analogously, the reaction of hydrazine with α -lactams yielded 1,2,4-triazine-3,5-diones [4,5]. This reaction is not exceptional; other examples of cyclization of acyclic molecules have been reported [6][7][8][9].Our attempt to prepare the reaction product of semicarbazidodiacetic acid H 2 NC ( O ) NHN ( CH 2 COOH ) 2 with zinc chloride resulted in isolation of a new cyclic triazine that can be used as a ligand for complexation with transition metals. EXPERIMENTAL Synthesis of çé 2 ëëç 2 ç 2 · 1/2 H 2 O ( I ) . Semicarbazidodiacetic acid (0.38 g, 0.002 mol) in 15 ml of methanol was added to a warm solution of ZnCl 2 (0.23 g, 0.001 mol) in 20 ml of methanol. The white square-plate crystals of I precipitated on slow cooling of the solution (yield ~40% ). The compound is soluble in water, methanol, and ethanol; mp = NNHCONHCOC 140-142° C (mp of semicarbazidodiacetic acid is 161° C). Synthesis of [é 2 ëëç 2ç 2 ] 2 Cu ( II ) . Compound I (0.36 g, 0.002 mol) in 20 ml of methanol was added to a warm solution of CuCl 2 · 2 H 2 O (0.17 g, 0.001 mol) in 20 ml of a water-methanol mixture. The solution color slowly changed from green to violet, and light violet crystals precipitated (yield ~45% ). The compound is soluble in water, methanol, and ethanol. X-ray diffraction analysis. The unit cell parameters and the experimental data for crystals of I and II were measured on a KUMA KM-4CCD diffractometer (graphite monochomator, MoK α radiation) at T = 150 K for I and 100 K for II . The distance between the crystal and the CCD detector was 60 mm. For compound I , 6864 reflections were collected in four series ( ϕ = 0°, 90°, 180°, 270° ), altogether 465 frames, with a rotation step of 0.75° for the ω angle. The recording time for one frame was 5 s. For compound II , the intensity set contained 1664 reflections, 291 frames, with a recording time of 45 s for each frame. The small amount of experimental data is due to the crystal size (one of the crystal dimensions did not exceed 0.01 mm) and the For C 5 H Abstract -A new organic compound, 2'-(3,5-dioxo-1,2,4-triazinane-1-yl)acetic acid, was prepared by transit template synthesis, and its crystal structure...

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“…A formate complex, anhydrous Cu(HCO2) 2 (Barclay & Kennard, 1961), and an acetate complex Cu(acetate)Br(NH3) 2 (Belicchi Ferrari, Calzolari Capacchi, Gasparri Fava & Nardelli, 1972), both have the carboxylate bridge linking square-pyramidal coordinations base-to-base. In Cu(HCO2)2(H20) 2, one of the formate groups bridges in an anti-syn mode between octahedral Cu atoms (Bukowska-Strzyzewska, 1965). The only structure similar to that of the title complex is of p-formato-(diethylenetriammine)copper(II) formate (Davey & Stephens, 1971) where the bridge links base-to-apex.…”

Section: Catena-lt-formato-formatobis(pyridine)copper(ii) Monohydratementioning

confidence: 99%

A square-pyramidal copper complex containing both monodentate and anti-syn bridging formate groups: crystal structure of catena-μ-formato-formatobis(pyridine)copper(II) monohydrate

Cartwright¹,

Couchman²,

Skapski³

1979

Acta Crystallogr Sect B

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ExperimentalCrystals of the title complex, Cu(HCO2) 2-(pyridine) 2. H20, are orthorhombic with a = 9.731 (1), b = 14.351 (1), c = 10.302 (1) A, space group Pnma, Z = 4. The structure was refined to R = 0.043 for 1420 independent reflections. Both independent formate groups and the Cu atom lie on a mirror plane, and the complex has a polymeric chain structure. One formate is monodentate and the other bridges in an anti-syn fashion. Thus each Cu atom is coordinated to three formate groups and to two pyridine molecules. Coordination about Cu is essentially square-pyramidal, the base consisting of two trans pyridine N atoms

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The crystal structure of copper(II) formate dihydrate

Cited by 55 publications

References 0 publications

Structure and Metal‐Metal Interactions in Copper(II) Carboxylate Complexes

Structure and Metal‐Metal Interactions in Copper(II) Carboxylate Complexes

Synthesis and crystal structure of 2′-(3,5-dioxo-1,2,4-triazinane-1-yl)acetic acid and the product of its reaction with copper(II) chloride

A square-pyramidal copper complex containing both monodentate and anti-syn bridging formate groups: crystal structure of catena-μ-formato-formatobis(pyridine)copper(II) monohydrate

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