Synthesis, Structure, and Temperature-Dependent Dynamics of Neutral Palladium Allyl Complexes of Annulated Diaminocarbenes and Their Catalytic Application for C−C and C−N Bond Formation Reactions
作者:Sarim Dastgir、Karl S. Coleman、Andrew R. Cowley、Malcolm L. H. Green
DOI:10.1021/om1000327
日期:2010.11.8
bifurcated hydrogen bond between the tetrafluoroborate anions and the central imidazolinium proton (−NCHN−). The palladium(II) complexes (η3-C3H5)Pd(BIAN-SIMes)Cl (5a) and (η3-C3H5)Pd(BIAN-SIPr)Cl (5b) have been synthesized. The temperature-dependent NMR behavior of σ-bonded palladium(II) complex 5b was studied. The crystal structure of 5b shows a localized single and double bond between the allyl ligand. The
咪唑啉鎓盐7,9-双(2,4,6-三甲基苯基)-6b,9a-二氢ac庚啶[1,2- d ]咪唑啉四氟硼酸酯和7,9-双(2,6-二异丙基苯基)-6b,9a-二氢ac庚啶已制备分别命名为[(BIAN-SIMes)(H)] BF 4(3a)和[[(BIAN-SIPr)(H)] BF 4(3b)的[1,2- d ]咪唑啉四氟硼酸盐,并结构特征。3a的分子结构显示四氟硼酸根阴离子和中心咪唑啉鎓质子(-NC H N-)之间存在分叉的氢键。钯(II)络合物(η 3 -C 3 H ^ 5)的Pd(卞-SIMES)氯(5A)和(η 3 -C 3 H ^ 5)的Pd(卞-SIPR)氯(5B)已经被合成。研究了σ键结合的钯(II)配合物5b的随温度变化的NMR行为。5b的晶体结构显示烯丙基配体之间的局部单键和双键。钯(II)配合物5a和5b的催化活性已针对Suzuki型C-C偶联和使用芳基卤化物的室温C-N键形成进行了评估。