Hydrogen bonding short-strong

Perrin CL (2010) Are short, low-barrier hydrogen bonds unusually strong Acc Chem Res 43 1550-1557... 

Gerlt, J. A., Kreevoy, M. M., Cleland, W. W., and Frey, P. A., 1997. Understanding enzymic catalysis The importance of short, strong hydrogen bonds. Chemistry and Biology 4 259-267. 

Figure 27.6 Some typical planar complexes of nickel (11) (a) Ni(Mcft-acac)2). (b) Ni(Me-sal)2] and (c) [Ni(dmgll)2. (Note the short 0-0 distance which is due to strong hydrogen bonding.)...

Due to its strong hydrogen bonds, in the vapor state hydrogen fluoride is found as short chains and rings. Draw the Lewis structure of an (HF)3 chain and indicate the approximate bond angles. 

The influence of water can be included by adding water molecules to the DFT calculation. Whereas the interaction with water will be discussed in more detail later, in short, the water interaction will be most important for adsorbates that easily form hydrogen bonds, react with water, or form strong ionic bonds to the surface. For other adsorbates, such as H, the effect of water is negligible [Jerkiewicz, 1998 Roudgar and Gross, 2005]. 

Remer, L. C., Jensen, J. H., 2000, Toward a General Theory of Hydrogen Bonding The Short, Strong Hydrogen Bond [HOH - OHE , J. Phys. Chem. A, 104, 9266. 

Smallwood, C. J., McAllister, M. A., 1997, Characterization of Low-Barrier Hydrogen Bonds. 7. Relationship Between Strength and Geometry of Short-Strong Hydrogen Bonds. The Formic Acid-Formate Anion Model System. An Ab Initio and DFT Investigation , J. Am. Chem. Soc., 119, 11277. 

In compounds (II) and (III) (Table 2) a very short O-O distance is observed, which is due to the formation of strong hydrogen bonds in [H(H20)2] + cations, whereas in compound (I) the 0-0 distance is about 0.3 A longer (Table 1 and papers [44,73,74,101]). In compounds (I) and (II) in contrast to (III), the Brax atoms are simultaneously bonded by way of an electrostatic interaction with two octanuclear fragments, thus forming in the crystals of these compounds endless chains. 

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