R diad

{
  "id": "MLC-T-CHM-009790",
  "term": "R diad",
  "field": "Chemistry",
  "definition": "A sequence of two adjacent monomer units in a polymer chain where the substituents on the main chain carbons have a racemic (r) configuration relative to each other. This indicates that the two chiral centers have opposite absolute configurations. The proportion of r diads contributes to the overall tacticity of the polymer chain.",
  "subject": "Polymer",
  "references": [
    "PAC, 2020, 92, 1769. 'Definitions and notations relating to tactic polymers (IUPAC Recommendations 2020)' on page 1773 (https://doi.org/10.1515/pac-2019-0409)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/r-diad/"
}