نتایج جستجو برای: n 32
تعداد نتایج: 1098164 فیلتر نتایج به سال:
An efficient synthesis of tetrasubstituted furans was achieved from the corresponding α,β-unsaturated ketone derivatives, acid chlorides, and Bu3P in the presence of Et3N via a chemoselective intramolecular Wittig reaction as the key step. The presence of an additional electron-withdrawing group in the α-position of Michael acceptors controlled the chemoselectivities of presumable phosphorus yl...
An 879.9(2) keV γ -ray transition has been identified following the β decay of 58V and assigned as the 21 → 01 transition in Cr34. A peak in the energies of the first excited 2 + states for the even–even chromium isotopes is now evident at Cr32, providing empirical evidence for a significant subshell gap at N = 32. The appearance of this neutron subshell closure for neutron-rich nuclides may be...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید