“…The carbamate and hydrazone groups in the title compound, C(18)H(18)N(4)O(6), are approximately orthogonal [dihedral angle = 83.3 (4)°], and the carbonyl groups are effectively anti [O=C⋯C=O torsion angle = −116.2 (7)°]. The conformation about the imine bond [1.295 (11) Å] is E. …”
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“…The meth­oxy group does not deviate from this plane [C—O—C—C torsion angle = −1.5 (3)°], indicating that the whole mol­ecule is almost planar. …”
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“…The hy­droxy group lies approximately in the plane of its attached benzene ring [O—C—C—C torsion angle = −17.47 (17)°], and the hydroxyl and methyl groups lie to the same side of the mol­ecule and are gauche to each other. …”
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“…The almost planar (within 0.09 and 0.06 Å) 4-CH(3)O–C(6)H(4)–CH=N–C(6)H(4)– groups are oriented outwards the twofold screw axis.…”
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“…Whereas the two outer methyl groups of the three meth­oxy groups are almost coplanar with the aromatic ring to which they are attached [C—C—O—C torsion angles = 8.5 (3) and −8.3 (3)°], the methyl group of the central meth­oxy substituent is not [C—C—C—C = −78.4 (3)°]. …”
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“…In the crystal of the title compound, C(24)H(22)NO(2) (+)·CF(3)SO(3) (−), adjacent cations and anions are connected through C—H⋯O, C—H⋯F and S–O⋯π inter­actions, while neighboring cations via π–π inter­actions [centroid–centroid distance = 3.962 (2) Å]. …”
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“…In the title compound, C(4)H(7)N(3)O·C(2)H(6)OS, creatinine [2-amino-1-methyl-1H-imidazol-4(5H)one] exists in the amine form. …”
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“…The aromatic rings of the title compound, C(13)H(10)O(3)·H(2)O, are aligned at dihedral angles of 20.6 (1) and 40.8 (1)° with respect to the triangular C(ar­yl)–C(=O)–C(ar­yl) fragment. The hy­droxy groups are each hydrogen-bond donors to separate water mol­ecules, the water mol­ecule itself being hydrogen-bonded to one hy­droxy group and one carbonyl group. …”
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“…In the title compound, C(13)H(14)N(4)O·C(3)H(7)NO, a 1,5-phenyl­carbonohydrazide mol­ecule cocrystallizes with an N,N-dimethyl­formamide mol­ecule. …”
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“…In the crystal structure of the title compound, C(19)H(14)N(+)·CF(3)SO(3) (−), the cations are linked to each other by very weak C—H⋯π inter­actions, while the cations and anions are connected by N—H⋯O, C—H⋯O and S—O⋯π inter­actions. The acridine ring system and the phenyl ring are oriented at an angle of 80.1 (1)° with respect to each other. …”
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“…The packing is stabilized by weak nonclassical inter­molecular C—H⋯O=C hydrogen bonds that link adjacent mol­ecules into chains.…”
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“…The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 70.88 (10) and 1.87 (12)°, respectively, with the naphthalene ring system and the benzene ring. …”
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“…The anions of the title salt, NH(4) (+)·HO(2)CC(6)H(4)–O–C(6)H(4)CO(2) (−), are linked by inter­molecular –CO(2)H⋯O(2)C– hydrogen bonds, forming a polyanionic chain in the crystal; adjacent chains are connected through the ammonium cation into a layer structure, with the ammonium cation serving as hydrogen-bond donor to four carboxyl­ate O atoms. …”
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“…In the crystal, mol­ecules are linked by weak inter­molecular C—H⋯O, C—H⋯F and C—H⋯π inter­actions. The crystal structure also exhibits aromatic π–π inter­actions between the central benzene and the outer benzene rings of neighbouring mol­ecules [centroid–centroid distance = 3.650 (3) Å].…”
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“…In the structure of the title compound, C(6)H(13)N(2)O(+)·C(2)H(3)O(2) (−)·H(2)O, the amide H atoms of the cations form centrosymmetric cyclic hydrogen-bonding associations incorporating two water mol­ecules [graph set R (4) (2)(8)], which are conjoint with cyclic water-bridged amide–amide associations [R (4) (4)(12)] and larger R (4) (4)(20) associations involving the water mol­ecule and the acetate anions, which bridge through the piperidinium H-bond donors, giving an overall three-dimensional framework structure.…”
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“…The asymmetric unit of the title compound, C(10)H(13)NO(3), contains two crystallographically independent mol­ecules with different conformations of the eth­oxy­carbonyl groups; the terminal C—C—O—C torsion angles in the two mol­ecules are 83.6 (6) and −171.1 (3)°, resulting in twisted and straight chain conformations, respectively. …”
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“…In the crystal, adjacent mol­ecules are linked via N—H⋯O=P and N—H⋯O=C hydrogen bonds into an extended chain parallel to the a axis. …”
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“…The carbonyl group is almost coplanar with the neighbouring phenyl ring [O—C—C—C = 178.9 (2)°]. The sulfanium group shows a trigonal–pyramidal geometry at the S atom. …”
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“…The amine lies trans to the carbonyl ligand and is substitutionally disordered over two positions in a 0.66 (1):0.34 (1) ratio. An array of C—H⋯O, C—H⋯Br and N—H⋯Br hydrogen-bonding inter­actions between the cations and the surrounding rhenate anions stabilize the crystal structure.…”
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“…The orientations of the meth­oxy groups in the two 2,4-dimeth­oxy­phenyl ligands are distinct, as seen from the torsion angles: C—C—O—C = 14.7 (3) and 175.97 (17)° in one ligand, and −9.1 (2) and 5.1 (3)° in the other. …”
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