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Veronika Chrenková and Dušan Valigura

Abstract

Pincer type ligand 2,6-pyridinedimethanol was used as a useful tool in the preparation of the Co(II) pseudoctahedral complex together with 3,5-dinitrobenzoate counteranion. New complex of the composition [Co(pydm)2](3,5-dnbz)2(pydm = 2,6-pyridinedimethanol, and 3,5-dnbz = 3,5-dinitrobenzoate anion) has been prepared and characterized. Its XRD structure revealed pseudooctahedral {CoN2O4} chromophore around the cobalt atom with Co-N distances significantly shorter (Co-Nav = 2.038 Ǻ) in comparison to the Co-O ones (Co-Oav = 2.142 Ǻ), which was probably the reason of its relatively high zero-field splitting parameter (D/hc = 43.6 cm-1). Positive value of the D parameter causes slow relaxation process typical for Co(II) SMM behavior. The 3,5-dinitrobenzoate counteranions are strongly bonded to the [Co(pydm)2] cation via rather strong hydrogen bonds (O∙∙∙Oav = 2.568 Ǻ) forming “quasi molecular” units. Solid state structure allowed different π-π stacking interactions of neighboring “molecular” unit aromatic rings probally leading to observation of the additional relaxation mode.

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Marcin Kuśmierz and Sylwia Pasieczna-Patkowska

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Vladimír Danielik, Pavel Fellner, Marián Bobok and Jomar Thonstad

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Nivrati Jain, Harshita Jain, Ashish Jain, Veerasamy Ravichandran and Prateek Jain

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Najmeh Soleimani, Esmaeel Mohseni, Fahimeh Rezaei and Fatemeh Khati

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Florentina Roncea, Horatiu Miresan, Adrian Cosmin Rosca, Mihaela Bratu and Antoanela Popescu

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Shashidhargouda H. R. and Shridhar N. Mathad

, Structural and mechanical properties of Sr+2 doped bismuth manganite thick films, International Journal of Self-propagating High Temperature Synthesis 22 (2013) 180-184. [12]. A.B. Kulkarni, S.N. Mathad, Synthesis and structural analysis of Co-Zn-Cd ferrite by Williamson-Hall and size-strain plot methods, International Journal of Self-Propagating High-Temperature Synthesis 27 (2018) 37-43. DOI: 10.3103/S106138621801003X [13]. Y.T. Prabhu, K.V. Rao, V.S.S. Kumar, B.S. Kumari, X-ray analysis by Williamson-Hall and size-strain plot methods of

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Silvia Mošovská, Dominika Nováková and Michal Kaliňák

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Akshay B. Kulkarni, Shridhar N. Mathad and Raghavendra P. Bakale

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Miroslava Puchoňová, Milan Mazúr and Dušan Valigura

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