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

[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.