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In the title complex, [PtCl2(C6H16N2)], the PtII atom adopts a distorted cis-PtN2Cl2 square-planar coordination geometry. The five-membered chelate ring adopts a twisted conformation. In the crystal, weak C—H...Cl hydrogen bonds link the mol­ecules into (001) sheets.

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In the title compound, C24H18ClN3O2S, the dihedral angle between the benzene ring and the anthracene ring system is 41.10 (8)°. The thia­zine ring has a half-chair conformation and the Cl atom is in an axial orientation. In the crystal, mol­ecules are linked by C—H...O inter­actions, generating C(8) chains along [100]. A C—H...N short contact occurs in the mol­ecule, generating an S(6) ring.

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In the title compound, C16H15N3O3S, the dihedral angle between the aromatic rings is 8.18 (11)° and the C=N—N=C torsion angle is 178.59 (14)°. The conformation of the thia­zine ring is an envelope, with the S atom displaced by 0.8157 (18) Å from the mean plane of the other five atoms (r.m.s. deviation = 0.045 Å). An intra­molecular O—H...N hydrogen bond closes an S(6) ring. In the crystal, weak C—H...O inter­actions link the mol­ecules, with all three O atoms acting as acceptors.

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The mol­ecule of the title compound, C11H13ClN2O2, is approximately planar (r.m.s. deviation = 0.099 Å for non-H atoms) and adopts a Z conformation about the C=N double bond. In the crystal, mol­ecules are linked by N—H...O and C—H...O hydrogen bonds to the same O-atom acceptor, forming zigzag chains propagating along [010]. These inter­actions give rise to R21(6) loops.
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