Preparation and X-Ray Structure of 4-N,N′-Bis(trimethylsilyl)- amino-3,5-diisopropylphenylselenium Trichloride
1999 ◽
Vol 54
(9)
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pp. 1170-1174
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Keyword(s):
X Ray
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The reaction of SeCl4 or SeCl2 with N,N′-bis(trimethylsilyl)-2,6-diisopropylaniline occurs not at the nitrogen atom but by electrophilic aromatic substitution at C-4 of the phenyl ring to give [(CH3)3Si]2NC6H2 (iPr2)SeCl3 , which crystallizes as the chloro-bridged dimer in the triclinic system, space group P1̅, a - 10.2598(17), b = 13.665(3), c = 9.7838(10) Å, a = 90.056(13), ß = 102.439(11), γ = 70.922(14)°, V = 1262.3(4) Å3, Z= 1. The dimer contains an essentially planar Cl2Se(μ-Cl)2SeCl2 unit, with trans apical (Me3Si)2NC6H2(iPr)2 groups, resulting in approximately square pyramidal geometry at Se. The bridging Se-Cl distances are unequal at 2.587(2) and 2.749(2) Å.