Pinacol coupling reactions of aromatic aldehydes and ketones were carded out using Nd-36% HOAc-CH2Cl2 system with stirring at r. t. for 4 h （in 14-70% yield）. The reactions in the same system gave pinacols in 10-93%...Pinacol coupling reactions of aromatic aldehydes and ketones were carded out using Nd-36% HOAc-CH2Cl2 system with stirring at r. t. for 4 h （in 14-70% yield）. The reactions in the same system gave pinacols in 10-93% yield under ultrasound irradiation at r. t. for 2 h.展开更多
A series of polymeric complexes were prepared from Fe^2＋, Co^2＋ or Ni^2＋ and poly（Schiff base） （DAPcIPA）, which was obtained by polycondensation of 5,6-diamino-1,10-phenanthroline （DAP） with isophthalaldehyde...A series of polymeric complexes were prepared from Fe^2＋, Co^2＋ or Ni^2＋ and poly（Schiff base） （DAPcIPA）, which was obtained by polycondensation of 5,6-diamino-1,10-phenanthroline （DAP） with isophthalaldehyde （IPA）. The structures of the polymer and the polymeric complexes were characterized by IR, 1^H-NMR and elemental analysis. The magnetic behavior of these complexes was measured as a function of magnetic field strength （0-3.98 ~ 106 A/m） at 5 K and as a function of temperature （5-300 K） at a magnetic field strength of 2.39 × 10^6 A/re. Experimental results show that DAPcIPA-Ni^2＋, DAPcIPA-Co^2＋ are soft ferromagnets while DAPcIPA-Fe^2＋ exhibits features of an antiferromagnet.展开更多
1, 4-Bis[3-N-propionyl-2-aryl-1, 3, 4-oxadiazoline-5-yl]phenylenes 4 were synthesized by cyclization of corresponding hydrazones 3 with propionic anhydride.
基金supported by the Natural Science Foundation of Hebei Province(203107)the Science Foundation of Hebei Langfang Normal College(200517).
文摘Pinacol coupling reactions of aromatic aldehydes and ketones were carded out using Nd-36% HOAc-CH2Cl2 system with stirring at r. t. for 4 h （in 14-70% yield）. The reactions in the same system gave pinacols in 10-93% yield under ultrasound irradiation at r. t. for 2 h.
基金This work was financially supported by the National Natural Science Foundation of China(Nos.20374044 and 20434020).
文摘A series of polymeric complexes were prepared from Fe^2＋, Co^2＋ or Ni^2＋ and poly（Schiff base） （DAPcIPA）, which was obtained by polycondensation of 5,6-diamino-1,10-phenanthroline （DAP） with isophthalaldehyde （IPA）. The structures of the polymer and the polymeric complexes were characterized by IR, 1^H-NMR and elemental analysis. The magnetic behavior of these complexes was measured as a function of magnetic field strength （0-3.98 ~ 106 A/m） at 5 K and as a function of temperature （5-300 K） at a magnetic field strength of 2.39 × 10^6 A/re. Experimental results show that DAPcIPA-Ni^2＋, DAPcIPA-Co^2＋ are soft ferromagnets while DAPcIPA-Fe^2＋ exhibits features of an antiferromagnet.
文摘1, 4-Bis[3-N-propionyl-2-aryl-1, 3, 4-oxadiazoline-5-yl]phenylenes 4 were synthesized by cyclization of corresponding hydrazones 3 with propionic anhydride.
