Title: Crystal structure of beryllium nitrate complexes (NO){sub 2}[Be(NO{sub 3}){sub 4}] and Be{sub 4}O(NO{sub 3}){sub 6}; Kristallicheskoe stroenie nitratnykh kompleksov berilliya (NO){sub 2}[Be(NO{sub 3}){sub 4}] i Be{sub 4}O(NO{sub 3}){sub 6}
Abstract: Dinitrosonium tetranitratoberyllate (NO){sub 2}[Be(NO{sub 3}){sub 4}] (1) is synthesized by reaction of BeCl{sub 2} with liquid N{sub 2}O{sub 4} in the presence of ethylacetate and X-ray diffraction investigation is carried out. Crystal structure 1 is orthorhombic: a=13.471(4), b=23.916(6), c=6.229(2) A, Z=8, sp.gr. Fdd2, R{sub 1}=0.0412. Structure is composed of nitrosonium cations (N-O 0.916(9) A) and anions [Be(NO{sub 3}){sub 4}]{sup 2-} with tetrahedral coordination of beryllium (distance Be-O 1.627-1.641(9) A) and monodentate nitrate groups. Trigonal modification of beryllium oxonitrate Be{sub 4}O(NO{sub 3}){sub 6} (2): a=13.638(3), c=6.475(2) A, Z=3, sp.gr. P3, R{sub 1}=0.0585 is produced during thermal decomposition of 1. Structure of 2 consists of tetranuclear molecules of Be{sub 4}O(NO{sub 3}){sub 6} with central four-coordination atom of O (Be-O 1.59-1.64 A) forming OBe{sub 4} tetrahedron and six NO{sub 3} bidentate groups on every Be-Be rib with distances Be-O 1.60-1.72 A. Probably, 2 is a high temperature modification of beryllium oxonitrate.
Publication Year: 2000
Publication Date: 2000-12-01
Language: en
Type: article
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