trans-Bis(μ-2-hydroxy­ethanethiol­ato-κ2 S:S)bis­[dinitro­syliron(II)](Fe—Fe)

The title complex, [Fe2(C2H5OS)2(NO)4], lies on a crystallographic inversion center. The Fe—Fe distance is characteristic of a metal–metal bond. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link complex mol­ecules into a two-dimensional network

Model-guided Code Assistance for Framework Application Development

Object-oriented frameworks are currently widely used in software application development. Unfortunately, they are known to be generally difficult to use because of the difficulty in understanding the concepts and constraints in different frameworks. With the formalization of framework concepts and constraints in domain-specific modeling languages called framework-specific modeling languages (FSMLs), previous works have shown that round-trip engineering between models of applications using frameworks and the application code is possible to aid framework application development. Framework-specific modeling languages only capture, however, framework concepts and constraints and hence, lack the expressiveness of general-purpose modeling languages. For this reason, the complete code for an entire framework application cannot be generated from the model in the model editor using round-trip engineering, and the user would need to switch to the code editor to program the application logic code. Also, since models are only abstractions of code, implementation details in code may be missing in models. Although default implementation details can be used when generating code from a model, the generated code might require further customization by the user, which would also require switching to the code editor. To reduce the need for the user to switch between the model editor and the code editor and to reduce the need to customize the generated code, this thesis presents a model-guided approach to providing code assistance for framework application development directly in the code editor, where additional implementation details can also be obtained. An approach to building a context-sensitive code assistant that aids the user in the implementation of framework concepts with the consideration of framework constraints is described. A prototype has further been implemented and applied on two widely popular frameworks. The evaluation in this thesis analyzes and characterizes framework concepts and shows that the framework-based code assistant can reduce the need to customize the generated code in the code editor when compared to code generation from the model editor.</p

3,3′-Bis(3-meth­oxy­benz­yl)-1,1′-(ethane-1,2-diyl)­diimidazolium dibromide dihydrate

In the title compound, C24H28N4O2 2+·2Br−·2H2O, the diimid­azo­lium cation is located on an inversion center. The imidazole and the benzene rings make a dihedral angle of 68.08 (04)°. In the crystal, O—H⋯Br, C—H⋯O and C—H⋯Br hydrogen bonds link the diimidazolium cations, the bromide anions and the water mol­ecules into a two-dimensional network

Bis{2-meth­oxy-6-[(3-methoxy­prop­yl)imino­meth­yl]phenolato-κ2 N,O 1}copper(II)

The title complex, [Cu(C12H16NO3)2], adopts a distorted square-planar coordination geometry with the CuII ion situated on a crystallographic inversion center. The two Schiff base ligands are coordinated in a trans fashion. In the crystal structure, non-classical inter­molecular C—H⋯O hydrogen bonds involving the ether O atoms link the Schiff base mol­ecules into a two-dimensional network parallel to (101)

3,3′-Bis(3-methoxy­benz­yl)-1,1′-ethyl­enediimidazolium dibromide

In the title compound, C24H28N4O2 2+·2Br−, the imidazolium cation is located on an inversion centre. The two imidazole rings are parallel to each other, whereas the imidazole and benzene rings make a dihedral angle of 77.25 (16)°. Non­classical inter­molecular C—H⋯Br hydrogen bonds link the imidazolium cations and the bromide anions into a three-dimensional network

trans-Bis[1-(2-anilino-2-oxoeth­yl)-3-benzyl-1H-imidazol-2-yl]palladium(II) methanol disolvate

In the title compound, [Pd(C18H16N3O)2]·2CH3OH, the PdII atom is located on a crystallographic inversion center. It has a square-planar coordination geometry, with the two bidentate ligands coordinated in a trans fashion via the carbene C atom and the amido N atoms. The methanol solvent mol­ecules form O—H⋯O hydrogen bonds with the complex. Additional non-classical inter­molecular C—H⋯O hydrogen bonds link the complexes into a two-dimensional network parallel to (001)

A new monoclinic polymorph of trans-dichloridodipyridine­palladium(II)

In the structure of the title compound, [PdCl2(C5H5N)2], the PdII atom is located on an inversion centre and the pyridine rings are coplanar. There is inter­molecular π–π stacking between the pyridyl rings, with a centroid-to-centroid separation of 3.916 (1) Å. The structure is a new polymorph of two previously determined structures [Viossat, Dung & Robert (1993 ▶). Acta Cryst. C49, 84–85; Liao & Lee (2006 ▶). Acta Cryst. E62, m680–m681]

3,3′-Dibenzyl-1,1′-ethyl­enediimidazolium dibromide

In the title compound, C22H24N4 2+·2Br−, the imidazolium dication is located on a crystallographic inversion center. The imidazole and benzene rings make a dihedral angle of 73.1 (9)°. In the crystal, non-classical inter­molecular C—H⋯Br hydrogen bonds link the ion pairs into a two-dimensional network

3,3′-Bis(4-fluoro­benz­yl)-1,1′-ethyl­enediimidazolium tribromidocuprate(I)

The title compound, (C22H22F2N4)[CuBr3], crystallizes with the cation situated on an inversion center and the anion on a twofold rotation axis along one Cu—Br bond. The two imidazole rings are in an anti configuration. The anion has a trigonal planar coordination geometry

1,3-Bis(2-anilino-2-oxoeth­yl)-1H-imidazol-3-ium chloride acetonitrile monosolvate

In the title compound, C19H19N4O2 +·Cl−·C2H3N, the dihedral angle between the two phenyl rings is 69.57 (8)° while the dihedral angles between the imidazole ring and the phenyl rings are 70.61 (7) and 82.11 (7)°. In the crystal, N—H⋯Cl, C—H⋯O, C—H⋯Cl and C—H⋯N hydrogen bonds link the imidazolium cations, chloride anions and acetonitrile solvent mol­ecules into a two-dimensional hydrogen-bonded network parallel to (001); an intra­molecular C—H⋯O hydrogen bond is also observed