Single crystals of cis-[Pt(NO2)2(NH3)2], were obtained by means of hypersaturation directly out of a plating electrolyte. The square-planar coordination environment of the divalent Pt atom is formed by four N atoms belonging to two ammine and two monodentate nitrite ligands. The ligands adopt a cis configuration. The crystal structure contains stacks of close-packed molecules which run parallel...

The hydrogen bond is the most important of all directional intermolecular interactions. It is operative in determining molecular conformation, molecular aggregation, and the function of a vast number of chemical systems ranging from inorganic to biological. Research into hydrogen bonds experienced a stagnant period in the 1980s, but re-opened around 1990, and has been in rapid development since...

The first systematic electronic resolution study of a series of urea-based anion receptor complexes is presented. The hydrogen bonding in these multi-component systems was fully characterised using Bader's Quantum Theory of Atoms In Molecules (QTAIM) with the strength of the various N-H···anion hydrogen bonds quantified and the individual contributions of different intermolecular forces to the ...

Water has anomalous properties that emanate from its hydrogen-bond-induced structure. Most of the unique properties ofwater are related to the network of strong three-dimensional hydrogen bonds that interconnect the water molecules [1, 2]. According to Stillinger [3], water has a preferential three-dimensional tetrahedral structure containing a few free or single-bonded water molecules. A simul...

Submitted for the MAR08 Meeting of The American Physical Society How Large are Cooperative Effects in Hydrogen Bonded Molecular Chains? MARTIN FUCHS, MATTHIAS SCHEFFLER, Fritz-Haber-Institut der MPG, Berlin, Germany, JOEL IRETA, Univ. Autonoma Metropolitana Iztapalpa, Mexico — Intermolecular hydrogen bonds play an eminent role in a wide range of materials. In particular, they are critical for t...

A deficiency of cytochrome c oxidase (COX) is associated with a number of diseases but details of the enzyme's mechanism of action especially the interaction with its substrate, ferrocytochrome c, remain unclear. It is known that the transfer of electrons from ferrocytochrome c to COX is facilitated by the formation of enzyme-substrate (ES) complexes which are stabilized by intermolecular salt ...

A recent paper (Phys. Rev. Lett. 109, 173201, 2012) has introduced the concept of vibrational conical intersections as a potential source of ultrafast vibrational relaxation, using the coupling between high-frequency OH modes and low-frequency intramolecular hydrogen bonding modes of malonaldehyde as an example. Here, the question is addressed whether such conical intersections may also appear ...

The O-HtriplebondO bonds in vic-diols C(n)H(m)(OH)(2) have been studied using data retrieved from the Cambridge Structural Database. About half of these diols form complete, or almost complete, sets of intermolecular O-HtriplebondO bonds (i.e. two satisfied donors per molecule). For this half of the structures the frequencies of high-symmetry space groups and of structures with Z' > 1 (more tha...