Monomeric molecules in the isostructural calcium(II) and strontium(II) complexes with pyrazine-2-carboxylic acid

• Autorzy: Ptasiewicz-Bąk, H. , Ostrowski, A. , Leciejewicz, J.
• Języki publikacji: EN

Abstrakty

EN

The crystals of cis-tetraquobis(pyrazine-2-carboxylato-O,N)calcium(II) contain monomeric molecules, in which the calcium ion has a distorted dodecahedral coordination, formed by four water molecules (mean Ca-O = 2.441 A), two oxygen atoms from monodentate carboxylic groups of two pyrazinic acid molecules (mean Ca-O = 2.458 A) and two nitrogen atoms located next to the above carboxylic groups (mean Ca-N = 2.619 A). In the crystals of cis-tetraquobis(pyrazine-2-carboxylato-O,N)strontium(II) the coordination of the Sr(2+) ion is identical with that of the calcium complex, the corresponding mean distances being Sr-O(water) 2.572 A, Sr-O 2.588 A, Sr-N 2.751 A. The monomeric molecules of both compounds are linked via a network of hydrogen bonds.

Słowa kluczowe

EN

pyrazine-2-carboxylic acid; calcium complex; strontium complex; X-ray structure analysis

• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 8
• Strony: 2014-2023
• Opis fizyczny: Bibliogr. 16 poz., tab.

Twórcy

autor

Ptasiewicz-Bąk, H.

autor

Ostrowski, A.

autor

Leciejewicz, J.

• Institute of Nuclear Chemistry and Technology ul. Dorodna 16 03-195 Warszawa Poland