Since fulvenes show no evidence of ring currents, the chemical shifts of the protons will be found in the normal definite region.
既然富烯不显示环电流存在的迹象，所以质子的化学位移仍然发生在正常的链烯区。
2
Some new 6, 6-diaryl fulvenes were synthesized from the diaryl ketones. Their structures were characterized by ir, 1h NMR, MS spectra and elemental analysis.