نتایج جستجو برای: picolinic acid
تعداد نتایج: 747468 فیلتر نتایج به سال:
Reaction of PdCl2 with N,N-bis-(diphenylphosphanylmethyl)-2-aminopyridine (bdppmapy) afforded a mononuclear complex [(bdppmapy)PdCl2] (). Compound was characterized by elemental analysis, IR, (1)H, (13)C and (31)P NMR, electrospray ion mass spectra (ESI-MS) and X-ray single crystal crystallography. The Pd(ii) center in is chelated by bdppmapy, showing a cis-square planar geometry. With the assi...
The 2-carbene tautomer of pyridine (I), azacyclohexanetriene2-ylidene (II), was first proposed by Hammick1 70 years ago to explain the facile decarboxylation of 2-picolinic acid. Recent theoretical calculations2 have shown that II has energy about 4550 kcal‚mol-1 higher than I and that the transition state for the I to II rearrangement lies ca. 85 kcal‚mol-1 above I. Accordingly, the I to II ta...
Since the synthesis of 2,4-D, a number of other synthetic auxins have become commercially available. Although these products are referred to as growth regulators or phytohormones (previously known as plant hormones), they really represent only one group of growth regulators, the auxins. Auxins can be divided into six major groups; indole acids, naphthalene acids, phenoxy carboxylic acids, benzo...
A novel picolinate-iron(III) compound, Fe(C6H4NO2)2(OH) (1), was synthesized from an aqueous solution of a picolinate-iron(II) complex. Compound 1 was obtained by a thermal treatment of the picolinate-iron complex aqueous solution, whose pH was adjusted to 37, containing more than twice molar picolinic acid (Hpa) to Fe at 353K for 72 h. When the iron aqueous solution in the presence of more th...
A method for preparation of the p-nitrophenyl-, N-hydroxysuccinimidyland pentafluorophenyl esters of isonicotinic and picolinic acids from the corresponding acids is reported.
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