STRUCTURE OF PARAMAGNETIC DIFURAZANOPYRAZINE AMMONIUM SALTS

STRUCTURE OF PARAMAGNETIC DIFURAZANOPYRAZINE AMMONIUM SALTS Full article

Journal

Journal of Structural Chemistry
ISSN: 1573-8779 , E-ISSN: 0022-4766

Output data

Year: 2022, Volume: 63, Number: 11, Pages: 1779-1786 Pages count : 8 DOI: 10.1134/s0022476622110075

Authors

Ovcharenko V.I. ^1,2 , Bogomyakov A.S. ^1,2 , Fokin S.V. ² , Romanenko G.V. ² , Strizhenko K.V. ¹ , Sheremetev A.B. ¹ , Egorov M.P. ¹

Affiliations

1	Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
2	International Tomography Center, Siberian Branch, Russian Academy of Scienses, Novosibirsk, Russia

The structure of previously unknown compounds NH4(HL•)(HL)·3H2O and NH4(L•)x(HL)1x·H2O (L• is a radical anion, HL is a deprotonated difurazanopyrazine derivative, HL• is a product of difurazanopyrazine oxidation) prepared by the oxidation of difurazanopyrazine (H2L) in aqueous ammonia is described. It is established that the shortest distances between the neighboring {L} in NH4(HL•)(HL)·3H2O and NH4(L•)x(HL)1–x·H2O fall within a fairly narrow range of 3.15-3.30 Å, despite the fact that they have substantially different stackings of {L} fragments. The bond lengths and bond angles of molecules {L} in all the studied compounds differ insignificantly. The energy of interaction between the paramagnetic centers in ammonium difurazanopyrazine salts is sharply diminished due to the decreased content of paramagnetic particles and, consequently, increased distances between these particles.

Ovcharenko V.I. , Bogomyakov A.S. , Fokin S.V. , Romanenko G.V. , Strizhenko K.V. , Sheremetev A.B. , Egorov M.P.
STRUCTURE OF PARAMAGNETIC DIFURAZANOPYRAZINE AMMONIUM SALTS
Journal of Structural Chemistry. 2022. V.63. N11. P.1779-1786. DOI: 10.1134/s0022476622110075 WOS Scopus OpenAlex

≡ Web of science:	WOS:000895714200007
≡ Scopus:	2-s2.0-85143507026
≡ OpenAlex:	W4310813908