N,N′ -Dipropyl-N,N,N′ ,N′-tetramethyl-1,2-ethylenediammonium dichloride (1) and dibromide (2) were prepared by the reaction of N,N,N′,N′-tetramethyl-1,2-ethylenediamine and the corresponding 1-halopropane. The structures of the compounds were characterized by single-crystal X-ray diffraction. 1 · 2H2O crystallizes in the triclinic crystal system, space group P1, with Z = 1, and 2 in the monocli...

In the crystal of the title compound, C11H12O5S2, mol-ecules are linked by O-H⋯O hydrogen bonds and C-H⋯O inter-actions, forming a three-dimensional network.

In the crystal structure of the title molecular salt, C(6)H(14)N(+)·Br(-), N-H⋯Br hydrogen bonds link the cations and anions to form a one-dimensional network.

In the crystal of the title compound, C(23)H(19)ClF(3)NO(3), mol-ecules are linked by one C-H⋯O hydrogen bond and two C-H⋯π inter-actions into a three-dimensional network.

A method for simultaneously integrating label-free photonic crystal biosensor technology into microfluidic channels by a single-step replica molding process is presented. By fabricating both the sub-micron features of the photonic crystal sensor structure and the >10 microm features of a flow channel network in one step at room temperature on a plastic substrate, the sensors are automatically s...

In the crystal structure of the title compound, C(13)H(14)ClNO(2), inter-molecular C-H⋯O inter-actions link the mol-ecules into a two-dimensional network.

The title salt, C9H11N2 (+)·NO3 (-), features a planar cation (r.m.s. for 11 non-H atoms = 0.016 Å). In the crystal, N-H⋯O hydrogen bonds link nitrate and benzimidazole ions into a three-dimensional network.

The crystal structure of the title co-crystal, 2C(6)H(7)N(3)O·C(6)H(10)O(4), is a second polymorph, designated form II, of the co-crystal formed between the two mol-ecules [Lemmerer et al. (2011 ▶). CrystEngComm, 13, 55-59]. The asymmetric unit comprises one mol-ecule of nicotinic acid hydrazide, and one half-mol-ecule of adipic acid (the entire mol-ecule is completed by the application of a ce...

The water molecules in 25 (21 high-resolution and four atomic resolution) crystal structures of bovine pancreatic phospholipase A(2) have been analyzed in order to identify the invariant water molecules and their possible roles. A total of 24 water molecules have been identified that are invariant in all 25 crystal structures examined. These include the catalytic water molecule, which is direct...