Metallocene halides. Part I. Synthesis, spectra, and redistribution equilibria of di-π-cyclopentadienyldihalogeno-titanium(<scp>IV</scp>),-zirconium-(<scp>IV</scp>), and -hafnium(<scp>IV</scp>)
作者:P. M. Druce、B. M. Kingston、M. F. Lappert、T. R. Spalding、R. C. Srivastava
DOI:10.1039/j19690002106
日期:——
An improved synthesis of (π-C5H5)2HfCl2 and new method for preparing Group IVA metallocene fluorides, bromides, and iodides from either boron halides or C6F5CN, are reported. Vibrational (4000–600 cm.–1), 1H n.m.r., and mass spectra are presented. The mixed halides (π-C5H5)2MClBr have been identified by n.m.r. spectroscopy; in tetrahydrofuran solutions, redistribution equilibria (π-C5H5)2MCl2+(π-C5H5)2MBr2⇌
报道了一种改进的(π- C 5 H 5)2 HfCl 2的合成和从卤化硼或C 6 F 5 CN制备IVA族茂金属氟化物,溴化物和碘化物的新方法。给出了振动(4000–600 cm。–1),1 H nmr和质谱图。混合卤化物(π- C 5 H 5)2 MClBr已通过核磁共振光谱法鉴定;在四氢呋喃溶液中,再分布平衡(π- C 5 H 5)2 MCl2 +( π -C 5 ħ 5) 2 MBR 2 ⇌ 2( π -C 5 ħ 5) 2 MClBr在38℃大约统计。