2-(tert-Butoxy­carbonyl­amino)-2-(2-fluoro­phen­yl)acetic acid

The title compound, C13H16FNO4, consists of conventional, centrosymmetric carboxyl­ate dimers. These dimers form infinite polymeric chains due to inter­molecular N—H⋯O hydrogen bonding. The 2-fluoro­phenyl unit is disordered over two sets of sites with an ocupancy ratio of 0.915 (3):0.085 (3)

5-[(E)-(5-Bromo-2-hy­droxy­benzyl­idene)amino]-1,3,4-thia­diazole-2(3H)-thione

In the title mol­ecule, C9H6BrN3OS2, the dihedral angle between the benzene ring and the five-membered ring is 5.5 (3)°. An intra­molecular O—H⋯N hydrogen bond forms an S(6) ring motif. In the crystal, N—H⋯S hydrogen bonds link mol­ecules into centrosymmetric dimers creating R 2 2(8) ring motifs. In addition, there are inter­molecular S⋯S [3.430 (2) Å] contacts. The crystal used was a non-merohedral twin with a ratio of 0.113 (3):0.887 (3) for the components

1-(2-Oxoindolin-3-yl­idene)-4-[2-(tri­fluoro­meth­yl)phen­yl]thio­semicarbazide

In the title compound, C16H11F3N4OS, the dihedral angle between the aromatic ring systems is 69.15 (10)°. Intra­molecular N—H⋯N and N—H⋯O hydrogen bonds generate S(5) and S(6) rings, respectively. A short N—H⋯F contact also occurs. In the crystal, inversion dimers linked by pairs of N—H⋯O hydrogen bonds generate R 2 2(8) loops. The dimers are linked by N—H⋯F hydrogen bonds, forming polymeric chains propagating in [100]. π–π inter­actions also exist between the centroids of the benzene rings of the 2-oxoindoline group at a distance of 3.543 (3) Å and a short C=O⋯π contact occurs. Two F atoms of the trifluoro­methyl group are disordered over two sets of sites in a 0.517 (8):0.483 (8) ratio

1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-aminium chloride–thio­urea (1/1)

In the title compound, C11H14N3O+·Cl−·CH4N2S, the components are connected into a two-dimensional polymeric structure parallel to (001) via N—H⋯Cl, N—H⋯O, N—H⋯S and C—H⋯S hydrogen bonds. The dihedral angle between the phenyl and 2,3-dihydro-1H-pyrazole rings is 44.96 (7)°

N-{(E)-[4-(Dimethyl­amino)­phen­yl]methyl­idene}-2,3-dimethyl­aniline

There are two independent mol­ecules in the asymmetric unit of the title compound, C17H20N2, in which the dihedral angles between the aromatic rings are 30.34 (11) and 41.44 (8)°. In the crystal, weak C—H⋯π inter­actions may help to establish the packing

{4,4′,6,6′-Tetra­bromo-2,2′-[2,2-dimethyl­propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenolato}nickel(II)

The asymmetric unit of the title compound, [Ni(C19H16Br4N2O2)], comprises half of a Schiff base complex. The geometry around the NiII atom, located on a twofold rotation axis, is distorted square-planar, which is supported by the N2O2 donor atoms of the coordinated ligand. The dihedral angle between the substituted benzene rings is 23.19 (17)°. In the crystal, a short inter­molecular Br⋯Br [3.6475 (7) Å] inter­action is present

Crystal structure of catena-poly[[tri-methyltin(IV)]-μ-2-(2-nitrophenyl)-acetato-κ2O:O′]

The authors acknowledge the provision of funds for the purchase of a diffractometer and encouragement by Dr Muhammad Akram Chaudhary, Vice Chancellor, University of Sargodha, Pakistan.Peer reviewedPublisher PD

Methyl 4-{[(4-methyl­phen­yl)sulfon­yl]amino}­benzoate

In the mol­ecule of the title compound, C15H15NO4S, the dihedral angle between the two rings is 88.05 (7)°. The methyl ester group is nearly coplanar with the adjacent ring [dihedral angle = 2.81 (10)°], whereas it is oriented at 86.90 (9)° with respect to the plane of the ring attached to the –SO2– group. Weak intra­molecular C—H⋯O hydrogen bonding completes S(5) and S(6) ring motifs. The mol­ecules form one-dimensional polymeric C(8) chains along the [010] direction due to N—H⋯O hydrogen bonding and these chains are linked by C—H⋯O hydrogen bonds, forming a three-dimensional network

4-Methyl-N-{4-[(5-methyl-1,2-oxazol-3-yl)sulfamo­yl]phen­yl}benzene­sulfonamide

In the title compound, C17H17N3O5S2, the dihedral angle between the two benzene rings is 81.27 (8)° and the heterocyclic ring is oriented at 9.1 (2) and 76.01 (9)° with respect to these rings. Mol­ecules are connected via N—H⋯N and N—H⋯O hydrogen bonds, generating an R 2 2(8) motif, into chains running along the [001] direction. There is also an intra­molecular C—H⋯O hydrogen bond completing an S(6) ring motif. The polymeric chains are inter­linked through inter­molecular C—H⋯O hydrogen bonds

Molecular Characterization of Wheat Genotypes Using SSR Markers

Wheat (Triticum aestivum L.) rusts are the most destructive and widespread among all other diseases of wheat because of their wide distribution, and their capacity to form new races that can attack previously resistant cultivars which result in serious yield losses. The molecular characterization and genetic diversity of 20 wheat genotypes was investigated using 34 polymorphic Simple Sequence Repeats (SSR) screened primers. About thirty-one loci were found. Lr-19 gene was present in all 20 wheat genotypes that cause resistance against wheat rust. Shalimar-86 and Chakwal-86 showed the highest genetic diversity with SH-02 and Ufaq respectively, giving a 98.94% genetic similarity and a minimum genetic diversity was observed between Chakwal-50 and Bhakar which showed that they are 74% similar. The current research found that SSR makers could distinguish and characterize all of the genotypes, more screened primers could be used for study and for saturation of different regions in further research. The identification of rust resistant genes in Pakistani wheat germplasm will help in accelerating the breeding program in future, including pyramiding of different wheat resistant genes in wheat genotypes and varieties