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The crystal structure of the title compound, [Nd(H2O)9]Cl3·2C6H12N4·4H2O, is the first neodymium chloride complex with a cage adamanzane without any chloride ion in the lanthanide coordination sphere. The Nd-O distances range from 2.4425 (17) to 2.5635 (18) Å, and the neodymium ion has the coordination geometry of a capped square antiprism distorted toward a tricapped trigonal prism. The cations, [Nd(H2O)9]3+, are connected via hydrogen bonds to hexa­methyl­enetetra­mine mol­ecules, water mol­ecules and chloride ions.

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The asymmetric unit of the title compound, C16H21O5PS, contains two symmetry-independent mol­ecules. The overall molecular geometry of both mol­ecules is very similar. The coumarin ring systems are only insignificantly distorted from planarity. In the structure, C—H...O and C—H...π weak intermolecular hydrogen bonds can be found. In addition, stacking interactions between the rings are present.

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In the title compound, [Pt(C14H19N4S)Cl], the azepane ring is partially disordered over two sites. The Pt atom coordination adopts a slightly distorted square-planar geometry. The 2-acetyl­pyridine thio­semicarbazone moiety is very close to planar. The azepane ring has a (−sc, +sc)3, +sp conformation (sc is synclinal and sp is synperiplanar) and, for the minor disorder component, a (−sc, +sc)3, −sp conformation. The computed bond valences for the Pt centre are νPt—N = 0.467 and 0.587, νPt—S = 0.60, and νPt—Cl = 0.48 v.u. (valence units), and thus the computed valence of the Pt atom is 2.13 v.u. π–π stacking inter­actions give rise to π-bonded dimers.

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The non-H atoms of the title compound, C8H10N2O2, are almost coplanar. The conformation is stabilized by an intra­molecular N—H...O hydrogen bond. The mol­ecules are linked via inter­molecular N—H...O hydrogen bonds into a one-dimensional chain. There are inter­molecular C—H...π inter­actions and π...π stacking inter­actions present in the structure. The hydrogen-bonded chain is expanded into a three-dimensional net via stacking inter­actions.

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The asymmetric unit of the title compound, C27H27OPS2·0.5C6H6, is composed of a heterocyclic molecule and one half-benzene ring, the solvent molecule being located on a centre of inversion. The 16-membered ring has an irregular −ap, −ap, +sp, +ac, −sc, +ap, −ap, −sc, +ap, −ap, +sc, +sp, −ap, +ap, +sp, −ac conformation. The phospho­rus tetra­hedron exhibits its usual deformation, with C—P—C angles smaller than the usual tetra­hedral value of 109.5° and O—P—C angles greater than this value. In the structure, there is a stacking inter­action between the P-bonded benzene rings. Furthermore, there is a weak inter­molecular C—H...O hydrogen bond. In this way, a hydrogen-bonded chain is created along the crystallographic a axis.

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In the title racemic compound, C9H19O5P, all inter­atomic C—C and C—OH distances can be considered normal. The P—O and P=O distances are 1.5583 (8) and 1.5003 (7) Å, respectively. The rings are cis-fused, the phospho­lane ring exists in a slightly distorted envelope conformation and the cyclo­hexane ring adopts an almost ideal chair conformation. All hydroxyl groups are anti to the P=O bond. Mol­ecules are linked via medium-strength inter­molecular O—H...O hydrogen bonds into a three-dimensional network.
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