Water hydrogen-oxygen bonds

The polarity of the hydrogen-oxygen bond is responsible for much of the force of attraction between water molecules in liquid water. (See Figure 5-15.)... 

Our studies have also shown that water will react spontaneously with some metals or can be caused to react further by photoexcitlng the adduct. Reaction in all cases leads initially to metal insertion into the hydrogen-oxygen bond. This metal hydroxy-hydride will, for certain metals, undergo photolysis to... 

Thus, 222kcalmol must be transferred to HOH to produce atomic oxygen, which is a measure of the deactivation and stabilization of atomic oxygen in the formation of a water molecule. Another important and unique characteristic of water molecules is their tendency to cluster through intermolecular hydrogen bonds (more properly hydrogen-oxygen bonds) (equation 2). In contrast, for ambient conditions, BH3, CH4, NH3, and HF are monomeric gas molecules (as are CO, CO2, H2S, and SO2). 

Water is the essential matrix for (C, N, O, H)-based life. Thus, all living biopolymers have a water-carbohydrate surface component with hydrogen-oxygen bonding. The... 

Decomposition of the carboxyl radical (RC02 ) to carbon dioxide (CO2) and an alkyl radical (R ) follows and, eventually, the alkyl radical dimerizes or loses hydrogen to another alkyl radical (Scheme 9.100). It is important to note that hydrogen abstraction from water by the hydrocarbon radical is retarded by the need to break the strong hydrogen-oxygen bond. 

Figure C2.14.2. The hydrogen bond in water. The oxygen lone pairs (shaded blobs) are the donors, and the hydrogen atoms the acceptors [ 177, 178].

Section 16 3 The carbon-oxygen bond of ethers is polar and ethers can act as proton acceptors m hydrogen bonds with water and alcohols... 

Overall the reaction is classified as an addition Water adds to the carbonyl group Hydrogen becomes bonded to the negatively polarized carbonyl oxygen hydroxyl to the positively polarized carbon... 

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