Organoselenium(II) and selenium(IV) compounds containing 2-(Me2NCH2)C6H4 moieties: solution behavior and solid state structure

Organoselenium(II) complexes containing organophosphorus ligands. Crystal and molecular structure of PhSeSP(S)Ph2, [2-{MeN(CH2CH2)2NCH2}C6H4]SeSP(S)R′2 (R′ = Ph, OPr ) and [2-{O(CH2CH2)2NCH2}C6H4]SeSP(S)(OPr )2

“…E intramolecular coordination, E = Se, Te) have attracted continuous interest in last years due both to their increased thermal and hydrolytic stability and their potential applications [1][2][3][4][5][6][7][8]. Selenium compounds with 2-(diorganoaminomethyl)phenyl and related organic groups in which the nitrogen atom is intramolecularly coordinated to the chalcogen center were already used as catalysts in asymmetric synthesis [9][10][11][12][13][14][15][16][17], as antioxidant reagents or enzyme mimics [1,[18][19][20][21].…”

“…2-(Me 2 NCH 2 )C 6 H 4 [6,22,23], 2-[O(CH 2 CH 2 ) 2 NCH 2 ]C 6 H 4 and 2-[MeN(CH 2 CH 2 ) 2 NCH 2 ]C 6 H 4 [24]. The structural investigations on a series of these compounds, i.e.…”

“…diorganodichalcogenides, organochalcogen(II) halides and organochalcogen(II) complexes with dithio ligands (diorganodithiocarbamates, diorganodithiophosphinates and tetraorganodithioimidodiphosphinates) revealed a T-shaped geometry of the chalcogen (Se, Te) atom, due to the intramolecular N ? E interaction [6,[22][23][24].…”

“…It is well known that this type of ligands usually involve both sulfur atoms in coordination to a metal or a metalloid center, acting as chelate or bridging units [25][26][27][28][29][30]. In the above mentioned complexes the dithio ligands behave monodentate, only one sulfur atom being involved in coordination to the selenium center [6,23]. However, structural changes could arise due to the nature of the C,N-organic group attached to selenium or when this is replaced by a phenyl group.…”

Hypercoordinated organoselenium compounds with O→Se intramolecular interactions

“…During the last years our research interest was focused on organoselenium compounds with organic groups of type 2-(R 2 NCH 2 )C 6 H 4 (R = Me, Et, Pr i ) [11][12][13][14], 2,6-(R 2 NCH 2 )C 6 H 3 [15], (RN=CH)C 6 H 4 (R = Bn, Mes, Ph) [16] or 2-(O=CH)C 6 H 4 [17] groups, as well as several metal complexes, either metal organoselenolates [18][19][20], or compounds bearing the alkoxo functionalized ligands, [R 2 C(OH)CH 2 ](2-Me 2 NCH 2 C 6 H 4 )Se [21]. As a continuation of our studies we discuss here the crystal and molecular structure of two organoselenium(II) compounds with potential for hypercoordination, namely …”