Transformations of Polymers of 4,4'-Dipyridyl and Cobalt(II) and Manganese(II) Cymantrenates in the Presence of N-Donors of Different Denticity

Abstract

It has been found that the reactions of a suspension of 1D-coordination polymers (CPs) {(μdipywhere dipy is 4,4'-dipy) with monodentate pyrazole (Hpz) and 3,5-dimethylpyrazole (Hdmpz) upon boiling in CH 2 Cl 2 lead to the formation of 1D-CPs {μ-dipy)Mn[(OOC-C 5 H 4 )Mn(CO) 3 ] 2 (Hpz) 2 } n (1) and {(μ-dipy)Co[η 2 -(OOCC 5 H 4 )Mn(CO) 3 ][(OOCC 5 H 4 )Mn(CO) 3 ](Hdmpz)• Hdmpz} n (2), respectively. In the initial manganese(II) polymer, a binuclear fragment with coordination of two Hpz molecules by a metal atom in 1 is destroyed, and in the case of cobalt(II), two alcohol molecules are replaced by an Hdmpz molecule, and one of the anions becomes η 2 -coordinated. As a result of the reaction of the initial cobalt(II) CP with 1,10-phenanthroline (Phen) containing a water molecule, binuclear complex Co 2 [(OOCC 5 H 4 )Mn(CO) 3 ] 4 (Phen) 2 (μ-dipy)(OH 2 ) 2 (3) is formed. The synthesized compounds 1-3 were studied by chemical analysis, IR spectroscopy, and X-ray diffraction analysis.

Spectroscopic and thermal studies of mixed ligand coordination compounds of cobalt (II) with aspartic and dicarboxylic acids

“…Usually, the cobalt(II) ion has an octahedral configuration and is considered 4 T 1g (t 2g ) 5 (e g ) 2 or 2 E g (t 2g ) 6 (e g ) 1 . Therefore, to determine its position in coordination compounds, we studied the electronic absorption spectra in the UV and visible regions [25].…”

“…Especially in the field of biometallurgy, reactions involving amino acids and proteins form the basis of technological processes for processing mineral raw materials (ores) with the participation of various microorganisms and extracting basic and additional components from them. In recent years, interest in complex compounds of intermediate metal ions with biologically active ligands has sharply increased, which is explained by the fact that metal ions play an important role in many different biological processes [1][2][3][4].…”

Spontaneous Isomerization [trans-B20H18]2– → [iso-B20H18]2– during Cobalt(II) Complexation with Phenanthroline

“…standing of the diversity of structures of mononuclear, dinuclear, and polymeric cobalt complexes, which opens up new possibilities for the synthesis of coordination polymers, MOFs, and compounds with desired properties [52][53][54][55][56]. CONCLUSIONS Thus, we have studied the complex formation of cobalt(II) chloride with 1,10-phenanthroline in the presence of the octadecahydro-eicosaborate anion [trans-B 20 H 18 ] 2and found spontaneous isomerization of the [trans-B 20 H 18 ] 2anion into [iso-В 20 Н 18 ] 2-.…”

Mononuclear Transition Metal Cymantrenecarboxylates as Precursors for Spinel-Type Manganites

“…Such complexes are of both theoretical and practical interest, since they are potentially capable of combining the properties of a transition metal ion and an organometallic fragment; in addition, they also can serve as precursors for mixed oxide phases, which are valuable functional materials. For a long time, mainly ferrocene derivatives were studied [ 10 , 11 ], while the known derivatives of the other stable organometallic π-complexes, namely, cymantrene ((η 5 -C 5 H 5 )Mn(CO) 3 ) [ 12 , 13 , 14 , 15 ], benchrotrene ((η 6 -C 6 H 6 )Cr(CO) 3 ) [ 16 , 17 , 18 ], and cobaltocenium ([(η 5 -C 5 H 4 ) 2 Co] + ) [ 19 , 20 ] are still relatively few. We have shown previously that the cymantrenecarboxylate ligand CymCO 2 − represents a convenient building block for construction of 3d-4f-heterometallic complexes having various structures [ 21 , 22 ].…”