title: Solid state structure and solution behaviour of organoselenium(II) compounds containing 2-{E(CH2CH2)2NCH2}C6H4 groups (E = O, NMe).
abstract: Cleavage of the Se-Se bond in [2-{O(CH(2)CH(2))(2)NCH(2)}C(6)H(4)](2)Se(2) (1) and [2-{MeN(CH(2)CH(2))(2)NCH(2)}C(6)H(4)](2)Se(2) (2) by treatment with SO(2)Cl(2), bromine or iodine (1 : 1 molar ratio) yielded [2-{O(CH(2)CH(2))(2)NCH(2)}C(6)H(4)]SeX [X = Cl (3), Br (4), I (5)] and [2-{MeN(CH(2)CH(2))(2)NCH(2)}C(6)H(4)]SeI (6). The compounds were characterized in solution by NMR spectroscopy (1H, 13C, 15N, 77Se, 2D experiments). The solid-state molecular structures of 1-3, 4.HBr, 5 and 6 were established by single crystal X-ray diffraction. In all cases T-shaped coordination geometries, i.e. (C,N)SeSe (1, 2), (C,N)SeX (3, 5, 6; X = halogen) or CSeBr(2) (4.HBr), were found. Supramolecular associations in crystals based on hydrogen contacts are discussed.
authors.affiliation: Faculty of Chemistry and Chemical Engineering, "Babes-Bolyai" University, RO-400028, Cluj-Napoca, Romania.
authors.forename: Monika
authors.initials: M
authors.lastname: Kulcsar
authors.forename: Anca
authors.initials: A
authors.lastname: Beleaga
authors.forename: Cristian
authors.initials: C
authors.lastname: Silvestru
authors.forename: Alina
authors.initials: A
authors.lastname: Nicolescu
authors.forename: Calin
authors.initials: C
authors.lastname: Deleanu
authors.forename: Cristina
authors.initials: C
authors.lastname: Todasca
authors.forename: Anca
authors.initials: A
authors.lastname: Silvestru
mesh_terms: D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry*; D016566:Organoselenium Compounds / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry
chemical_list: D016566:Organoselenium Compounds; D012996:Solutions; D009584:Nitrogen; D010100:Oxygen