CHEM 1A Lecture Notes - Lecture 21: Chemical Bond, Triple Bond, Bond Length

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17 Nov 2018
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Ligand atoms, also known as terminal atom, are connected to the central atom. Possible to achieve an octet by sharing 2/3 pairs of electrons. Double bond- 2 pairs of e- shared. Triple bond- 3 pairs of e- shared. Bond order- # of e- pairs shared between 2 atoms when covalent bond are formed. Bond order of single bond=1, double bond=2, triple bond=3 https://www. quora. com/how-can-you-distinguish-between-single-double-and-triple- covalent-bonds. Bond length- distance between nuclei of 2 atoms that are bonded to each other https://www. askiitians. com/forums/physical-chemistry/bond-length-is-defined-as- the-equilibrium-distance_110501. htm. Inter-nuclear distance- depends on size of atoms, bonds with larger atoms= greater bond length. Increasing bond length h-f < h-cl < h-br < h-i. Bond energy- always + because it is endothermic. As bonds are stronger bond energy http://www. science. uwaterloo. ca/~cchieh/cact/c120/bondel. html. Avg values used since bond length/energy vary from compound compound. Single bond hard to correlate bond energy and length. Single, double, triple= easier to find correlation. Nonpolar covalent bonds- same element bonding together.

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