Synthesis and Structural Trends in Pentafluorophenyl-Substituted Ferrocenes, 1,4-Tetrafluorophenylene-Linked Diferrocenes, and 1,1‘-Ferrocenylene−1,4-Tetrafluorophenylene Co-oligomers
Synthesis and Structural Trends in Pentafluorophenyl-Substituted Ferrocenes, 1,4-Tetrafluorophenylene-Linked Diferrocenes, and 1,1‘-Ferrocenylene−1,4-Tetrafluorophenylene Co-oligomers
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五氟苯基取代的二茂铁、1,4-四氟亚苯基连接的二茂铁和 1,1-二茂铁−1,4-四氟亚苯基共聚低聚物的合成和结构趋势
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发表时间:
2000
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通讯作者:
F. Fronczek
中科院分区:
文献类型:
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作者:
P. A. Deck;M. Lane;and Jennifer L. Montgomery;C. Slebodnick;F. Fronczek
1,1‘-Dilithioferrocene, or (CpLi)2Fe (1), reacts with excess C6F6 in THF to afford mostly (C6F5Cp)2Fe (2), accompanied by the diiron complex (C6F5Cp)FeCp(1,4-C6F4)CpFe(CpC6F5) (3). The reaction of 1 with 1.0 equiv of C6F6 affords a mixture of sparingly soluble step-growth oligomers assigned to [−FeCp(1,4-C6F4)−]n (4). [1-Li-2-RNCp]FeCp (6, RN = CH2NMe2) reacts with 1 equiv of C6F6 to afford [1-(C6F5)-2-RNCp]FeCp (7). Complex 6 reacts with 0.5 equiv of C6F6 to afford CpFe[2-RNCp](1,4-C6F4)[2-RNCp]FeCp as a mixture of two diastereomers (meso-8, major and dl-8, minor). The relative stereochemistry of meso-8 is established by crystallographic analysis of the corresponding bis(methiodide) (12). [1-Li-2-RNCp]Fe(CpLi) (9) reacts with excess C6F6 to afford mainly the diarylated ferrocene [1-(C6F5)-2-RNCp]Fe(CpC6F5) (10). The reaction of 9 instead with 1.0 equiv of C6F6 affords a mixture of oligomeric species assigned to the formula [−(2-RNCp)FeCp(1,4-C6F4)−]n (11). In contrast to 4, 11 is sufficiently soluble for...