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Articolul urmator |
1064 5 |
Ultima descărcare din IBN: 2023-09-10 15:25 |
SM ISO690:2012 DRAGANCEA, Diana, ARION, Vladimir, ŞOVA, Sergiu. Synthesis, characterization and crystal structure of bis-(2-hydroxybenzaldehyde) diaminoguanizone
. In: Chemistry Journal of Moldova, 2008, nr. 2(3), pp. 119-121. ISSN 1857-1727. |
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Chemistry Journal of Moldova | ||||||
Numărul 2(3) / 2008 / ISSN 1857-1727 /ISSNe 2345-1688 | ||||||
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Pag. 119-121 | ||||||
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The new ligand, bis(2-hydroxybenzaldehyde)diaminoguanizone (1) has been synthesized and characterized by elemental analysis, IR and 1H NMR spectroscopies. The crystal structure of the compound was determined by X-ray diffraction. The ligand C15H15N5O2·C2
H5OH crystallizes in the monoclinic space group P21/c with unit cell parameters a = 8.9102(3), b = 10.0357(3), c = 19.7618(6) Å, β = 98.385(2)°, Z = 4, V = 1748.21(9) Å3, R1 = 0.040. The amino form of the ligand adopts a planar conformation stabilized by two intramolecular hydrogen bonds of the type O–H···N, in which the H atoms of the central amino group are directed to the lone-pair regions of the azomethine nitrogen atoms.
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Cuvinte-cheie Schiff base, X-ray diffraction, guanidine |
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