An indium(III) chloride/silica gel promoted one‐pot multicomponent reaction for the synthesis of 5‐[2‐(1,2,4‐triazol‐3‐yl)hydrazinyl]‐1,2,4‐triazin‐6‐ones was developed by treating hydrazonoyl hydrochlorides with N,N′‐bis(trimethylsilyl)carbodiimine. The first step of the reaction mechanism involves the promotion of the 1,3‐dipolar cycloaddition by indium(III) chloride/silica gel. The subsequent cyclization and substitution reaction sequence employs 2 equiv of the nitrile imine and the silylamide intermediate, which may be the key species, to lead to the product.

Batteries. -Olivine LiFe1-xCoxPO4/C (x = 1, 0.5, 0.25, 0) cathode materials are hydrothermally synthesized from aqueous solutions containing LiOH, FeSO4, H3PO4, (NH4)2HPO4, Co(NO3)2, and ascorbic acid (autoclave, 170°C, 10 h). The materials are characterized by powder XRD, XPS, SEM, TEM, Raman spectroscopy, and electrochemical measurements. The Co-doped compounds achieve a higher discharge plateau (about 3.5 V) than does pure LiFePO4 (about 3.4 V). LiFe0.75Co0.25PO4 has a superior discharge capacity of 170 mAh/g at 0.1C. LiFe1-xCoxPO4 exhibits improved electrochemical performance at low discharge rates. However, the Li-O band stabilizes with increasing doping amount, which is not beneficial to the lithium diffusion coefficient of the compounds. -(ZHAO, R.-R.; HUNG, I.--.; LI, Y.-T.; CHEN*, H.-Y.; LIN, C.-P.; J. Alloys Compd. 513 (2012) 282-288, http://dx.