Naslov
Supramolecular potential of halogen interactions in metal-organic systems of Co(II) and Ni(II) pentane-2, 4-dionato complexes

Autori
Borovina, Mladen ; Kodrin, Ivan ; Đaković, Marijana

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

Izvornik
25th Slovenian-Croatian Crystallographic Meeting ; Book of Abstracts / - , 2017, 78-78

Skup
25th Slovenian-Croatian Crystallographic Meeting

Mjesto i datum
Ljubljana, Slovenija, 14.06.2017. - 18.06.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
crystal engineering ; supramolecular ; Co(II) ; Ni(II) ; halogen bonds ; halopyrimidines

Sažetak
In recent years the crystal engineering potential of halogen bonds was recognized and extensive research is being carried out to maximally utilize those interactions in engineering organic and metal-organic systems. It was even shown that in some cases it is possible to predict the halogen patterns according to electrostatic potential values calculated for each potential donor and acceptor. Halogen atoms can also form other, weaker supramolecular interactions such as halogen•••pi and C–H•••halogen interactions. Although their usual role in the crystal packing is only secondary, it was shown that they can become main structure directing interactions in systems lacking strong hydrogen and halogen bonding capability. We have recently reported our findings of type-I halogen•••halogen and halogen•••pi interactions present in a series of six isostructural pentan-2, 4-dionato Co(II) and Ni(II) complexes with chloro-, bromo- and iodopyrazine. It was found that halogen•••pi interactions play a secondary role in the packing while type-I interactions arise as the result of the packing itself. In order to assess possible steric effects as well as to determine the impact of electron withdrawing power of endocyclic nitrogen atoms on the overall halogen bond pattern formation, here we opted to examine a series of halopyrimidine derivates. To this aim we have prepared Co(II) and Ni(II) pentane-2, 4-ditionato complexes with iodopyridine and bromopyrimidine. The crystal packing of iodopyridine derivates is directed by I•••O halogen bonds, while in the crystal structure of bromopyrimidine derivatives halogen•••pi interactions were observed.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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