Inhaltsiibersicht. SeO(NPPh3)2 entsteht in Form farbloser Kri-bei -40°C: a = 931,6; b = 947,6; c = 1762 pm, cx = 77,50", stalle bei der Reaktion einer Suspension von SeOz rnit / 3 = 81,78", y = 79,23". Die Verbindung bildet monomere Mo-Me3SiNPPh3 in Acetonitril. Die Verbindung wird durch das IR-lekule, in denen das Selenatom verzerrt ptetraedrisch umgeben Spektrum und durch-eine Kristallstrukturanalyse charakteri-ist mit Abstanden SeO = 161,7 pm und SeN = 179,9 und siert. Raumgruppe P1, Z = 2, Strukturlosung rnit 5344 beob-181,6pm. achteten unabhangigen Reflexen, R = 0,064. Gitterkonstanten
Synthesis and Crystal Structure of the Selenyl-Phosphoraneiminato Complex SeO(NPPh,),Abstract. SeO(NPPh3)2 has been prepared from SeOz and Me,SiNPPh3 in a Se02 suspension in acetonitrile, forming colourless crystals. The compound is characterized by IR spectroscopy and by a crystal structure determination. Space group PI, Z = 2, structure solution with 5 344 observed unique reflections, R = 0.064. Lattice dimensions at -40 "C: a = 93 1.6, b = 947.6, c = 1762pm, a! = 77.50", /3 = 81.78", y = 79.23".The compound forms monomeric molecules in which the selenium atom is ptetrahedrally surrounded with bond lengths SeO = 161.7 pm and SeN = 179.9 and 181.6 pm.