Hypervalent selenium compounds containing N → Se intramolecular interactions: synthesis, characterization and X‐ray structures of [2‐(Me₂NCH₂)C₆H₄]SeS(S)PR₂ (R = Ph, OⁱPr)

Abstract

Abstract[2‐(Me2NCH2)C6H4]SeS(S)PR2 [R = Ph (1), OiPr (2)] were prepared by reacting [2‐(Me2NCH2)C6H4]2Se2 with the appropriate disulfanes, [R2P(S)S]2. The compounds were characterized by multinuclear magnetic resonance (1H, 13C, 31P). The molecular structures of 1 and 2 were determined by single‐crystal X‐ray diffraction. Both compounds are monomeric and the nitrogen atom of the pendent CH2NMe2 arm is strongly coordinated to the selenium atom. The organophosphorus ligands are monodentate, thus resulting in a T‐shaped coordination geometry around selenium. Copyright © 2002 John Wiley & Sons, Ltd.

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

“…The Se(1)-S(1) bond distances [2.2659(7), 2.247(1) and 2.2911(10) Å for 6, 7, and 8] are within the expected range for covalent selenium-sulfur single bonds, but are stronger than those observed for related [2-(Me 2 NCH 2 )C 6 H 4 ]SeS(S)PR 2 derivatives [2.3400(7) Å and 2.3373(10) Å for R = Ph and OPr i , respectively] [28]. The second sulfur atom of the dithioligands is not involved in any intermolecular interaction with selenium atoms.…”

“…In order to investigate the competition for internal coordination to the selenium centre when different donor atoms are available and the structural changes when the ''bite'' size of a potential chelating dithioligand is varied, [2-(Me 2 NCH 2 )C 6 H 4 ]SeS(S)CNR 2 [R = Me (6), Et (7)] and [2-(Me 2 NCH 2 )C 6 H 4 ]Se-S-PMe 2 @N-PPh 2 @S (8) were prepared. Their molecular structures were also established by single-crystal X-ray diffraction and are compared with those recently reported for [2-(Me 2 NCH 2 )C 6 H 4 ]SeS(S)PR 2 (R = Ph, OPr i ) [28].…”

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

“…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.…”

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 …”