The H-bonding energy correlates well with the increment of ring perimeter and the change of ring bond angle. For nitrocyclopropane∙∙∙HF, the effect of H-bond on the ring strain energy is notable, while for the other complex, it is negligible. Therefore, for nitrocyclopropane∙∙...
Ru-O-Hf peak at 1.85 Å. Both peaks shifted to a higher distance compared to those of VO-Ru/HfO2-OP. The qualitative evaluation of the spectra implies that the intensity of the Ru-O-Hf bond in VO-Ru/HfO2-OP is higher than that in VO-Ru/HfO2-P. In contrast, the intensity of...
Intriguingly, the difference between both ions in terms of acidity was not evident in the case of the PCN-222 structure when is metalated with Co. This fact indicates a cooperative catalytic effect between the Lewis acid character of Co2+ and the Brønsted acid character of Zr4+/Hf4+ ...
The sample MX1 shows the basal plane (0 0 2) peak shifted to a lower 2θ angle 9.34° corresponding to a d-spacing of 9.04 Å and MX2 shows the lower angle shifting of the (0 0 2) basal plane at 9.28° corresponding to a d-spacing of 9.42 Å Conclusion This study focuses ...