X-ray studies of 2-amino-4-(3-nitrophenyl)-5-oxo-4,5-dihydropyrano[3,2-c] chromene-3-carbonitrile and 2-amino-7,7-dimethyl-4-(4-nitrophenyl)-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile

Journal Article · Tue Dec 15 04:00:00 EST 2015 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774515070251· OSTI ID:22722838

Sharma, S. ^[1]; Banerjee, B.; Brahmachari, G. ^[2]; Kant, R.

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1. University of Jammu, X-ray Crystallography Laboratory, Post-Graduate Department of Physics & Electronics (India)
2. Visva-Bharati (a Central University), Laboratory of Natural Products & Organic Synthesis, Department of Chemistry (India)

Two carbonitrile compounds, 2-amino-4-(3-nitrophenyl)-5-oxo-4,5-dihydropyrano[3,2-c] chromene-3-carbonitrile (I) and 2-amino-7,7-dimethyl-4-(4-nitrophenyl)-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile (II), were synthesized, and their crystal structures were determined by X-ray diffraction technique. The crystals are triclinic, a = 7.7970(12), 8.2171(7), b = 9.0390(10), 9.2238(7), c = 15.148(2), 14.5585(11) Å, α = 81.439(10)°, 74.895(6)°, β = 75.194(12)°, 87.392(6)°, γ = 76.151(11)°, 78.552(7)°, for I and II, respectively, Z = 2, sp. gr. P1̄. The pyran ring in both the compounds deviates significantly from planarity and adopts boat conformation. The crystal structure is stabilized by N–H···O and N–H···N hydrogen bonds.

• OSTI ID: 22722838
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 7 Vol. 60; ISSN 1063-7745; ISSN CYSTE3
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
HYDROGEN
PYRANS
X-RAY DIFFRACTION