N.R. Mohan

Bio: N.R. Mohan is an academic researcher from Tumkur University. The author has contributed to research in topics: Ring (chemistry) & Piperazine. The author has an hindex of 2, co-authored 10 publications receiving 29 citations.

Germplasm Collection and Diversity Analysis in Yardlong Bean (Vigna unguiculata subsp. sesquipedalis) from Coastal Andhra Pradesh and Odisha

Abstract: Diversity in yardlong bean (Vigna unguiculata subsp. sesquipedalis), an under-utilized vegetable legume was collected from parts of North coastal Andhra Pradesh (Srikakulam and Viziznagaram districts) and adjoining regions of Odisha (Koraput and Gajapati districts). Substantial variation was observed among the 39 accessions collected. Most of collections had pods which were light green (28), some were light green with purple tip (6), and a few were dark green (4); one accession (IC582551, Jeypore, Koraput, Odisha) had purple pods with green tip. Variation in pod length ranged from 24–75 cm; fresh pod weight (10 pods) from 60–140 g and seeds/pod from 6.2–17. Pod length had the highest dispersion index (158%), followed by100-seed weight (127%), fresh pod weight (89%) and seeds/pod (83%). Accessions IC582850 and IC582863 had the longest pods (75 cm). A pure line selection from IC582850 (Jeypore, Odisha) is released for cultivation as ‘Arka Mangala’. This pole type, photo-insensitive variety with green, smooth pods and a crop duration of 3–4 months recorded a pod yield of 25.7 t/ha with an increase of 24% and 30% pod yield over the check varieties ‘Lola’ and ‘Vyjayanthi’, respectively.

6-[4-Chloro-2-(trifluoro­meth­yl)phen­yl]-3-fluoro-2-methyl­pyridine

Abstract: In the title compound, C13H8ClF4N, the dihedral angle between the benzene and pyridine rings is 59.8 (3)°. In the crystal, mol­ecules are stacked in columns along the b axis through weak C—H⋯π inter­actions.

4-(4-Methyl-phenyl-sulfon-yl)piperazin-1-ium tri-fluoro-acetate.

Abstract: In the title salt, C11H17N2O2S+·CF3COO−, the cation is protonated at the secondary piperazine N atom. The dihedral angle between the benzene ring and the piperazine mean plane is 85.54 (10)°. In the crystal, cations and anions are connected by two types of strong N—H⋯O hydrogen bonds into chains extending along [101]. The chains are further assembled into (10-1) layers via stacking inter­actions between benzene rings of the cations [centroid–centroid distance = 3.7319 (13) A] and a C—H⋯O inter­action involving a piperazine C—H group and a sulfonyl O atom. Another C—H⋯O inter­action between the piperazine ring and the sulfonyl group connects the ions into a three-dimensional network.

(E)-tert-Butyl 4-(N'-hy-droxy-carbam--imid-o-yl)piperazine-1-carboxyl-ate.

Abstract: In the title compound, C10H20N4O3, the piperazine ring adopts a chair conformation. The mol­ecule adopts an E conformation across the C=N double bond, with the –OH group and the piperazine ring trans to one another. Further, the H atom of the hy­droxy group is directed away from the NH2 group. An intra­molecular N—H⋯O contact occurs involving the NH2 group and the oxime O atom. In the crystal, mol­ecules are linked via strong N—H⋯O and O—H⋯N hydrogen bonds with alternating R22(6) and C(9) motifs into tetra­meric units forming R44(28) motifs.