Aqua(4,4'-dimethyl-2,2'-bipyridine-N,N')(malonato-O,O')copper(II) Dihydrate

In the title compound, [Cu(C4H4O4)(C10H8N2)(H2O)]·2H2O, the CuII ion displays a slightly distorted square-pyramidal coordination. The water molecule at the apical position shows a long bond [Cu—O = 2.276 (2) Å]. The basal plane is formed by two N atoms of the 2,2′-bipyridine ligand and two carboxylate O atoms from a malonate group. The five-membered chelate ring is almost planar [maximum deviation = −0.006 (2) Å], while the six-membered chelate ring defined by the malonate ligand adopts a distorted boat conformation. In the crystal, CuII complex molecules and lattice water molecules are connected by O—H⋯O and C—H⋯O hydrogen bonds. The crystal packing is further stabilized by π–π interactions [centroid–centroid distances = 3.563 (2)–3.828 (2) Å].

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“…Cu1-O1 = 1.907 (2) and Cu1-O2 = 1.919 (2) Å agree well with those reported for similar structures (Gasque et al, 1998;Cui et al, 2005).…”

Section: Methodssupporting

confidence: 90%

“…For related structures, see: Gasque et al (1998); Cui et al (2005). For ring puckering analysis, see: Cremer & Pople (1975).…”

Section: Related Literaturementioning

confidence: 99%

Aqua(2,2′-bipyridine-κ²N,N′)(2-methylmalonato-κ²O¹,O³)copper(II) dihydrate

Manochitra

Manikandan²,

Murugavel³

et al. 2012

Acta Cryst E

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“…Only a few X‐ray crystal structures with Cu II and the ligand 4,4′‐dimethyl‐2,2′‐bipyridine have been reported — two mononuclear structures5a, 5b and three polynuclear structures with copper( II ) halides 5c−5e. Recently the first X‐ray structures of di‐ tri‐ and tetranuclear Cu II compounds with this ligand were reported 5f−5h…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterisation, Properties and X‐ray Structures of Cu^II Coordination Compounds with 5,5′‐Dimethylbipyridine and Various Anions: Control of Stoichiometry and Structure by the Counterions

et al. 2004

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The synthesis, crystal structures, and electronic and magnetic properties of eight new CuII compounds containing the ligand 5,5‐dimethyl‐2,2,′‐bipyridine (dmbpy) with the general formula [CuII(dmbpy)x(L)2] (where L = BF4−, CF3SO3−, NO3−, Br−, NCS−, N3−, HCOO−, and x = 1−3) are reported. The geometries of the CuII ions include a four‐coordinate square‐planar polymeric compound [Cu(dmbpy)(N3)2]n (7), the five‐coordinate compounds, [Cu(dmbpy)2(C2H6O)](CF3SO3)2 (2), [Cu(dmbpy)2(NO3)](NO3) (3), [Cu(dmbpy)2(Br)]Br (5), [Cu(dmbpy)(NCS)2]n (6) and [Cu(dmbpy)2(HCOO)](CF3SO3) (8), which have geometries ranging from square pyramidal to trigonal bipyramidal, and the six‐coordinate compounds [Cu(dmbpy)3](BF4)2(C2H6O) (1) and [Cu(dmbpy)(NO3)2] (4), which adopt an octahedrally based geometry. Except for compounds 3 and 4, with nitrate as the anion, a variation of the copper/ligand ratios in the synthesis has no influence on the stoichiometry. The compounds have been characterised in detail by infrared, ligand field and EPR spectroscopy; the data are consistent with the single‐crystal X‐ray structures. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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“…There are 14 such structures in the CSD, in all of which [as in (I)] the malonate C-O bonds are bent significantly out of the CuN 2 O 2 coordination plane. Of these, seven [FIXDUM (Cui et al, 2005), SAYCUQ (Gasque et al, 1998), TIPZAT02 (Cernak, 2016), UNOJOY, UNOJUE, UNOKAL (Jaramillo-García et al, 2016), and XECFOC (Manochitra et al, 2012)] are monomeric, with R 2 = H and syn H 2 O ligands [Fig. 4(b)].…”

Section: Figurementioning

confidence: 99%

A copper complex of an unusual hydroxy–carboxylate ligand: [Cu(bpy)(C₄H₄O₆)]

Gao¹,

Fronczek²,

Maverick³

2021

Acta Cryst E

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A copper(II) complex, (2,2′-bipyridine-κ2 N,N′)[2-hydroxy-2-(hydroxymethyl-κO)propanedioato-κ2 O 1,O 3]copper(II), [Cu(C4H4O6)(C10H8N2)], containing the unusual anionic chelating ligand 2-(hydroxymethyl)tartronate, has been synthesized. [Cu(bpy)2(NO3)](NO3) was mixed with ascorbic acid and Dabco (1,4-diazabicyclo[2.2.2]octane) in DMF (dimethylformamide) solution in the presence of air to produce the title compound. The structure consists of square-pyramidal complexes that are joined by Cu...O contacts [2.703 (2) Å] into centrosymmetric dimers. The C4H4O6 2− ligand, which occupies three coordination sites at Cu, has previously been identified as an oxidation product of ascorbate ion.

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Aqua(4,4'-dimethyl-2,2'-bipyridine-N,N')(malonato-O,O')copper(II) Dihydrate

Cited by 15 publications

References 1 publication

Aqua(2,2′-bipyridine-κ²N,N′)(2-methylmalonato-κ²O¹,O³)copper(II) dihydrate

Aqua(2,2′-bipyridine-κ²N,N′)(2-methylmalonato-κ²O¹,O³)copper(II) dihydrate

Synthesis, Characterisation, Properties and X‐ray Structures of Cu^II Coordination Compounds with 5,5′‐Dimethylbipyridine and Various Anions: Control of Stoichiometry and Structure by the Counterions

A copper complex of an unusual hydroxy–carboxylate ligand: [Cu(bpy)(C₄H₄O₆)]

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Aqua(4,4'-dimethyl-2,2'-bipyridine-N,N')(malonato-O,O')copper(II) Dihydrate

Cited by 15 publications

References 1 publication

Aqua(2,2′-bipyridine-κ2N,N′)(2-methylmalonato-κ2O1,O3)copper(II) dihydrate

Aqua(2,2′-bipyridine-κ2N,N′)(2-methylmalonato-κ2O1,O3)copper(II) dihydrate

Synthesis, Characterisation, Properties and X‐ray Structures of CuII Coordination Compounds with 5,5′‐Dimethylbipyridine and Various Anions: Control of Stoichiometry and Structure by the Counterions

A copper complex of an unusual hydroxy–carboxylate ligand: [Cu(bpy)(C4H4O6)]

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Aqua(2,2′-bipyridine-κ²N,N′)(2-methylmalonato-κ²O¹,O³)copper(II) dihydrate

Aqua(2,2′-bipyridine-κ²N,N′)(2-methylmalonato-κ²O¹,O³)copper(II) dihydrate

Synthesis, Characterisation, Properties and X‐ray Structures of Cu^II Coordination Compounds with 5,5′‐Dimethylbipyridine and Various Anions: Control of Stoichiometry and Structure by the Counterions

A copper complex of an unusual hydroxy–carboxylate ligand: [Cu(bpy)(C₄H₄O₆)]