The substituted
phthalonitriles have been used to prepare soluble phthalocyanine species in
recent years. One of the most used phthalonitrile derivatives for the target
product is 4-nitrophthalonitrile. In this study 4-(4-formylphenoxy)
phthalonitrile was prepared as the substituted phthalonitrile derivative by the
nucleophilic substitution reaction of para-hydroxybenzaldehyde with 4-nitrophthalonitrile.
During the crystallization of the product by slow evaporation technique, it
readily self-oxidized to 4-(4-carboxylphenoxy) phthalonitrile at ambient
condition open to air. The crystal structure of the molecule was determined by
XRD technique. The molecule crystalizes at triclinic space group P-1 and the
unit cell parameters of crystal are a=6.3591 (10) Å, b=7.5464
(11) Å, c=13.819 (2) Å, α=88.434 (11)°, β=87.942 (12)°, γ=80.111
(12)° and Z=2. The crystal structure
has intermolecular O―H∙∙∙O, C―H∙∙∙N and C―H∙∙∙O hydrogen bonds. In addition to
these hydrogen bonds, C—N∙∙∙Cg and Cg∙∙∙Cg interactions are present between
molecules. In the crystal, intermolecular O―H∙∙∙O hydrogen bonds occur between
molecular units in a dimeric molecular form. Molecular structure, vibrational
frequencies and 1H and 13C NMR chemical shifts of the
target compound have been calculated by using B3LYP method with 6-311++G(d, p)
basis set, as well.
Primary Language | English |
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Journal Section | Natural Sciences |
Authors | |
Publication Date | September 30, 2019 |
Submission Date | June 21, 2018 |
Acceptance Date | September 19, 2019 |
Published in Issue | Year 2019 |