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Reactive E=C(p‐p)π‐Systems. 55. [1] Ligand Properties of 1‐Trifluoromethyl‐2‐diethylamino‐2‐fluoro‐1‐arsaethene, F 3 CAs=C(F)NEt 2
Author(s) -
Albers Thomas,
Grobe Joseph
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500206
Subject(s) - chemistry , ligand (biochemistry) , trifluoromethyl , lone pair , derivative (finance) , medicinal chemistry , chromium , nitrogen , molecule , stereochemistry , organic chemistry , receptor , biochemistry , alkyl , financial economics , economics
Due to the mesomeric interaction of the nitrogen lone pair with the As=C double bond, the perfluoroarsapropene derivative F 3 CAs=C(F)NEt 2 ( 1 ) is sufficiently stable to serve as a ligand in transition metal carbonyl complexes. 1 was coordinated to chromium by reaction with the photochemically generated labile complex Cr(CO) 5 (THF), yielding the monosubstituted pentacarbonyl derivative Cr(CO) 5 [F 3 CAs=C(F)NEt 2 ] ( 2 ). Already at room temperature, this is slowly transformed into the binuclear complex [F 3 CAs=C(F)NEt 2 ][Cr(CO) 5 ] 2 ( 3 ) by replacing 1 from a neighbouring molecule by the stronger donor 2 . In a closed system 3 obviously exists in an equilibrium with 1 and 2 . Both complexes are related to the previously studied derivatives of the 2‐dimethylamino‐perfluoro‐1‐phosphapropene ligand. The products were identified by spectroscopic (IR, NMR) investigations and comparison with the related phosphaalkene complexes.