Friday, April 3, 2020
What Does Resonance Mean in Chemistry?
What Does Resonance Mean in Chemistry?This week we're going to take a quick look at what does resonance mean in chemistry. What is it and how does it affect the outcomes of experiments?There are two concepts in the world of chemical interaction: a 'resonance' of two molecules that have slightly different vibrational frequency and a quantum mechanical conformation of the molecule itself. The resonance occurs because of the energy difference between the molecule and the larger or heavier atoms surrounding it. The resonance may be the cause of instability, but it also provides the vibrations necessary for electrons to move around the molecule in the process of bonding to its neighbors.Resonance in molecules must be properly coupled to energy states, which are expressed as kinetic energy in the form of a particle momentum - i.e. kinetic energy is proportional to distance and time and depends on the chemical state.In simple terms the term means 'free energy', and it allows a molecule to r espond to external chemical energy using the specific configuration of its molecular bonds. In chemistry it is the 'gravitational attraction of molecules from one another'.The interpretation of resonance in chemistry will depend on what it means to you. The only truly scientific term of this concept is 'molecular resonances'. In fact we are all familiar with the 'sound' of music when we hear a tune, or the 'sound' that you hear when standing near a powerful music system.Most of us probably relate resonance to the feeling that you get when standing near a guitar or harmonica, or perhaps when listening to a really loud band. We all know how it makes us feel - the resonance of the music is one of the few physical responses we can create. However, in chemistry, it is not just the feeling of the music that makes us relate to resonance; we also tend to relate to it because of the chemical properties of the material where the music is played.An essential property of a stable chemical react ion in a 'resonant environment' is called 'uncoupling'. When the bonds between neighboring molecules are able to uncouple from the bonds that connect them, then the molecules are no longer held together by the bonds they formed, they are simply floating freely in the empty space between adjacent molecules. The bond forms when the hydrogen atoms are combined with other atoms to form oxygen molecules, because they want to stay connected to their neighbors to form a structure with high molecular mass.
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