Naslov
Influence of the intramolecular hydrogen bonding on structures and stability of adducts of copper and zinc beta-diketonates with N-donor ligands

Autori
Bedeković, Nikola ; Klepić, Marta ; Stilinović, Vladimir ; Cinčić, Dominik

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
26th Croatian-Slovenian Crystallographic Meeting : Book of Abstracts / Matković-Čalogović, Dubravka ; Popović, Stanko ; Skoko, Željko - Zagreb : Hrvatska akademija znanosti i umjetnosti (HAZU) ; Hrvatska kristalografska zajednica HAZU, 2018, 45-45

Skup
26th Croatian-Slovenian Crystallographic Meeting (CSCM26)

Mjesto i datum
Poreč, Hrvatska, 13.06.2018. - 17.06.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
hydrogen bonding

Sažetak
Transition metal -diketonates are very well investigated coordination compounds which are often used as building blocks in crystal engineering.[1, 2] Metal(II) diketonates may exist either as the discrete complexes in square-planar or tetrahedral geometry, oligomers, or as adducts formed by binding of one or two neutral molecules to the metal center. Depending on how many additional molecules are bonded to the metal diketonate, square-piramidal or octahedral geometry of the complex could arise. If a ligand of interest contains a functional group able to act as hydrogen bond donor, then intramolecular hydrogen bonding can be established which could affect overall stability of the complex as well as crystal packing. In order to study the effects of intramolecular hydrogen bonding on stability of such compounds, several adducts of bis(diketonato)zinc(II) and copper(II) (wherein diketonate ligands were acetylacetone – acac, dibenzoylmethane – dbm, dipivaloylmethane – dpm and acetyl-benzoylmethane – abm) were prepared by crystallization from three different solvents (pyridine ¬– py, morpholine – morph and 2-amino-3- methylpyridine – 2a3mp). Crystallization experiments yielded eight adducts of 2a3mp, where intramolecular Namino–H‧‧‧Odiketo hydrogen bond have been observed. This interaction was also found in morph adducts whose formation have been observed exclusively for copper(II) complexes. Furthermore, pyridine adducts have been obtained only with bis(diketonato)zinc(II) compounds and there, as was expected, no intramolecular hydrogen bonding was found. Decomposition of the prepared compounds were analysed by thermogravimetry and differential scanning calorimetry, confirming the general trend of complexes with additional hydrogen bonds being more stable.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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