Cation-pi interactions: Difference between revisions
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==Chemistry== | ==Chemistry== | ||
Six-carbon aromatic rings occur in the sidechains of 3 of the [[amino acids|20 standard amino acids]]: namely [[Amino_Acids#Phenylalanine|phenylalanine]], [[Amino_Acids#Tryptophan|tryptophan]], and [[Amino_Acids#Tyrosine|tyrosine]]. | Six-carbon aromatic rings occur in the sidechains of 3 of the [[amino acids|20 standard amino acids]]: namely [[Amino_Acids#Phenylalanine|phenylalanine]], [[Amino_Acids#Tryptophan|tryptophan]], and [[Amino_Acids#Tyrosine|tyrosine]]. The atomic p orbitals of the carbons overlap sideways, forming a pi (π) orbital system, or pi cloud of delocalized electrons<ref name="lillya">[[User:Eric Martz|Eric Martz]] thanks Peter Lillya for help with terminology.</ref>. | ||
==Occurrence and Significance== | ==Occurrence and Significance== | ||