New cobalt- and sodium-containing heteronuclear phosphonate clusters: Synthesis, structure and properties

Burkovskaya, N. P.; Никифорова, М. Е.; Кискин, М. А.; Dobrokhotova, Zhanna V.; Bogomyakov, A. S.; Koroteev, Pavel S.; Pekhnyo, V. I.; Сидоров, А. А.; Новоторцев, В. М.; Еременко, И. Л.

doi:10.1016/j.poly.2012.01.005

Cited by 9 publications

(8 citation statements)

References 24 publications

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“…The reaction of {Co(Piv) 2 } n , Na 2 O 3 PPh, Hmhp, and NaPiv afforded a heterometallic Na 6 Co 5 complex, [(μ-HPiv) 2 (μ 2 -Hmhp) 4 Na 6 Co 5 (μ 6 ,η 2 -O 3 PPh) 2 (μ 3 ,η 2 -Piv) 2 (μ 3 -Piv) 3 (μ-Piv) 7 ] 2 · (C 10 H 22 ) [Hmhp = 6-methyl-2-pyridone, Piv = t-BuCO 2 − ]. 238 This compound contains six Na I Figure 108). 238 A hexanuclear planar Co II phosphonate, [Co 6 (chp) 8 237 has been synthesized in the reaction involving Co(NO 3 ) 2 ·6H 2 O, 6-chloro-2-hydroxypyridine (Hchp), and t-BuPO 3 H 2 ( Figure 109).…”

Section: Group 9 Phosphonatesmentioning

confidence: 99%

“…238 This compound contains six Na I Figure 108). 238 A hexanuclear planar Co II phosphonate, [Co 6 (chp) 8 237 has been synthesized in the reaction involving Co(NO 3 ) 2 ·6H 2 O, 6-chloro-2-hydroxypyridine (Hchp), and t-BuPO 3 H 2 ( Figure 109). The structure of this compound reveals the presence of two symmetrical Co 3 motifs that are connected to each other by the bridging oxygen atoms of the chp ligands.…”

Section: Group 9 Phosphonatesmentioning

confidence: 99%

“…GROUP 9 PHOSPHONATES The nuclearity of homonuclear cobalt phosphonates varies from 1 to 20, 237 while in the heterometallic systems the highest nuclearity achieved is 24. 238 Winpenny and his co-workers have contributed extensively to the study of this family of compounds (homonuclear Co II and heterometallic Co II /Ln III ) 1,21,22,45,46,120,170,237,239−242 with a particular interest in studying their magnetic properties including magneto caloric effect (MCE). 1,21,22,46,120 A representative mononuclear Co II phosphonate, [Co(2,2′bipy)(hedpH 3 ) 2 ]•H 2 O or [Co(1,10-phen)(hedpH 3 ) 2 ]•H 2 O, is described below.…”

Section: Chemical Reviewsmentioning

confidence: 99%

“…All of the reported compounds contain Co II ions except [Co 20 (O) 2 (OH) 4 (chp) 26 (PhPO 3 ) 4 (H 2 O) 6 ] (Hchp = 6-chloro-2-hydroxypyridine), which contains 18 Co II and two Co III ions. The nuclearity of homonuclear cobalt phosphonates varies from 1 to 20, while in the heterometallic systems the highest nuclearity achieved is 24 . Winpenny and his co-workers have contributed extensively to the study of this family of compounds (homonuclear Co II and heterometallic Co II /Ln III ) ,,,,,,,,− with a particular interest in studying their magnetic properties including magneto caloric effect (MCE). ,,,, …”

Section: Group 9 Phosphonatesmentioning

confidence: 99%

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Molecular Metal Phosphonates

2015

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Section: Group 9 Phosphonatesmentioning

confidence: 99%

Section: Group 9 Phosphonatesmentioning

confidence: 99%

Section: Chemical Reviewsmentioning

confidence: 99%

Section: Group 9 Phosphonatesmentioning

confidence: 99%

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Molecular Metal Phosphonates

2015

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“…As shown in earlier works on the synthesis of the phosphonate complexes, the additional use of Hmhp considerably extends possibilities of the synthesis of compounds with higher nuclearity [26,27]. However, the data on the influence of the nature of metal centers and additional ligands and their geometric parameters and synthesis conditions on the geometry of the poly nuclear metal phosphonates are rather restricted and, therefore, they require more detailed investigation.…”

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New nickel(II) carboxylate-phosphonate cluster: Synthesis and structure

et al. 2012

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Among many polynuclear phosphonate complexes of transition metals, the so called mixed ligand com plexes play a special role. The use of additional ligands in the synthesis of polynuclear architecture makes it possible to solve the problem of a low solubility of the phosphonate complexes and, finally, to obtain the polynuclear architecture with a specified set of physi cochemical properties. This class of compounds attracts attention of researchers due to their ability to ion exchange, adsorption, and proton conductivity. This assumes their potential use in photochemistry, electrooptics, and catalysis. In addition, the possibility of using such molecules in sensor devices and as molecular precursors for the preparation of various materials cannot be excluded [1][2][3][4][5][6][7][8][9].The method of self assembling can be distin guished among the methods for the preparation of such homo and heteronuclear molecules. In this method, the heteroligand coordination sphere is formed by phosphonate bridges and, for example, car boxylate anions [10][11][12][13][14][15][16][17][18][19] or other organic ligands of the type of 2 hydroxypyridine derivatives [20][21][22][23].In this work, we used trimethylacetate ligands determining, as a rule, the high spin state of metal atoms in transition metal complexes and containing bulky tert butyl substituents that provide the forma tion of the insular structure with high solubility in organic media. It could be assumed that the use of metal containing fragments with the high spin metal ions in molecular self assembling of a polynuclear structure with phosphonate bridges would result in the formation of a magnetically active architecture, because the presence of unpaired electrons on each metal center induces, as a rule, spin-spin exchange interactions between the adjacent metal ions and the appearance of antiferro , ferri , or ferromagnetic properties [10, 15, 17-19, 24, 25].As shown in earlier works on the synthesis of the phosphonate complexes, the additional use of Hmhp considerably extends possibilities of the synthesis of compounds with higher nuclearity [26,27]. However, the data on the influence of the nature of metal centers and additional ligands and their geometric parameters and synthesis conditions on the geometry of the poly nuclear metal phosphonates are rather restricted and, therefore, they require more detailed investigation.The results on chemical assembling of the polynu clear mixed ligand Ni(II) complexes are presented in this work. EXPERIMENTALComplex I was synthesized in air using commer cially available solvents MeCN and THF. Phenylphos phonic acid (Aldrich), pivalic acid (Aldrich), Hmhp (Fluka), and KOH (analytical grade) were used for the synthesis. Phenylphosphonic acid potassium salt K 2 O 3 PPh was obtained by the reaction of KOH and Н 2 O 3 PPh. Nickel pivalate [Ni 9 (OH) 6 (Piv) 12 (HPiv) 4 ] (II) was synthesized according to a described proce dure [28].Synthesis of [(μ 2 Hmhp) 6 Ni 12 (µ 3 OH) 4 (µ 6 O 3 PPh) 4 (μ 2 Piv) 12 ] · 7.5MeCN ⋅ 1.5THF (I ⋅ 7....

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