Reactive E=C(p-p)π-Systems. 55. [1] Ligand Properties of 1-Trifluoromethyl-2-diethylamino-2-fluoro-1-arsaethene, F3CAs=C(F)NEt2
作者:Thomas Albers、Joseph Grobe
DOI:10.1002/zaac.200500206
日期:2005.9
the mesomeric interaction of the nitrogen lone pair with the As=C double bond, the perfluoroarsapropene derivative F3CAs=C(F)NEt2 (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[F3CAs=C(F)NEt2]
由于氮孤对与 As = C 双键的内消旋相互作用,全氟胂丙烯衍生物 F3CAs = C (F) NEt2 (1) 足够稳定,可用作过渡金属羰基配合物中的配体。通过与光化学生成的不稳定络合物 Cr (CO) 5 (THF) 反应,1 与铬配位,产生单取代的五羰基衍生物 Cr (CO) 5 [F3CAs = C (F) NEt2] (2)。已经在室温下,通过用更强的供体 2 替换相邻分子中的 1,它慢慢地转化为双核复合物 [F3CAs = C (F) NEt2] [Cr (CO) 5] 2 (3)。在封闭系统中3 显然与 1 和 2 处于平衡状态。这两种配合物都与先前研究的 2-二甲氨基-全氟-1-磷丙烯配体的衍生物有关。产物经光谱(IR、