Collect. Czech. Chem. Commun. 2007, 72, 453-467
https://doi.org/10.1135/cccc20070453

Synthesis, Characterization and Catalytic Utilization of a Ferrocene Diamidodiphosphane

Petr Štěpničkaa,*, Jiří Schulza, Ivana Císařováa and Karla Fejfarováb

a Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 40 Prague 2, Czech Republic
b Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic

References

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16. The ester was isolated by column chromatography as an orange brown solid from the reaction mixture obtained in an attempted amidation of Hdpf with aniline in the presence of EDC/HOBt reagents and was characterized as follows. 1H NMR (CDCl3): 4.35 (apparent q, 2 H); 4.56 (apparent t, 2 H); 4.71 (apparent t, 2 H); 4.97 (apparent t, 2 H, 4 × CH of fc); 7.26–7.56 (m, 13 H, PPh2 and C6H4); 8.08 (dt, JHH = 8.4, ≈ 1, 1 H, C6H4). 31P{1H} NMR (CDCl3): –17.9 (s). GC-MS: m/z (relative abundance): 531 (89, M+•), 505 (6), 503 (5, [M – N2]+•), 487 (18), 414 (54, Hdpf+•), 397 (17), 386 (7), 370 (13), 363 (18), 321 (100, C5H4PPh2OFe), 305 (34).
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19. The observed difference in the bond lengths can be attributed to the different temperatures at which the structures have been determined (150 K for 3 vs r.t. for Hdpf).
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