Configurational repeating unit

{
  "id": "MLC-T-CHM-002407",
  "term": "Configurational repeating unit",
  "field": "Chemistry",
  "definition": "The shortest run of consecutive configurational base units that, repeated, reproduces the configuration of a regular polymer chain. For isotactic polypropylene it is a single base unit with fixed configuration, whereas for syndiotactic polypropylene it is a pair of base units of opposite configuration. Atactic chains have no configurational repeating unit because their configurations follow no repeating pattern.",
  "subject": "Polymer",
  "see_also": [
    "chain",
    "configurational base unit",
    "regular block",
    "regular macromolecule",
    "regular oligomer molecule",
    "stereoisomerism"
  ],
  "references": [
    "PAC, 1996, 68, 2287. 'Glossary of basic terms in polymer science (IUPAC Recommendations 1996)' on page 2291 (https://doi.org/10.1351/pac199668122287)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/configurational-repeating-unit/"
}