Bonding definition

Bicyclo[3.1.0]hex-2-ene, 291 sigmatropic rearrangement, 290-291 Bicyclo[2.1.0]pent-2-ene, 289 Bishomocyclopropenyl cation, 277 Bond, definition of, 50 Bond angles... 

Bond lengths collected from experimental data in X-ray crystal-structure determination of methyl pyranosides (11) and other products (77) strongly support the above discussion. Oxygen atoms with an electron pair antiperi-planar to a C — 0 R bond definitely have shorter C—0 bonds whereas the C - 0 R bond is longer than normal. Interestingly, theoretical calculations have been carried out (11, 78) and the results are consistent with the above discussion and experimental observations. 

Brovchenko I, Oleinikova A. Four phases of amorphous water simulations versus experiment. 1. Chem. Phys. 2006 124 164505. Kumar R, Schmidt IR, Skinner IL. Hydrogen bonding definitions and dynamics in liquid water. 1. Chem. Phys. 2007 126 204107. Geiger A, StiUinger FH, Rahman A. Aspects of the percolation process for hydrogen-bond networks in water. 1. Chem. Phys. 1979 70 4185-4193. 

In summary, H bonding definitely affects viscosity, increasing it in mixtures where H bonds occur. Drawing fundamental and quantitative information from viscosity measurements is obstructed by the same formidable complications that make any theoretical treatment of the liquid state a difficult task. 

Bishomocyclopropenyl cation, 277 Bond, definition of, 50 Bond angles... 

Keywords Hydrogen bonding definition of hydrogen bond classification of hydrogen bonding... 

Despite the fact that the proposed classification based on the H-bond definition (7) unambiguously resolves the aforementioned problems 0) and (8), it does not however give the complete answer on (a) what is the origin of a blue shift of nonconventional C-H- B bonds or, in the other words, of the biased nature of the proton-donating ability of the C-H group The latter is a main concern of the following section where it is shown that this problem is much deeper than earlier thought. 

Kumar R, Schmidt JR, Skinner JL (2007) hydrogen bond definitions and dynamics in hquid water. J Chem Phys 126 204107-1-204107-12... 

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