"cation-π" meaning in English

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  "etymology_text": "From cation + translingual π, where π is from π system. Aromatic residues are called π systems because they contain a lot of π links, links between p electrons.",
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        "A noncovalent interaction between a cation, a positive ion like Li⁺ or Na⁺, and an aromatic residue such as benzene, ethylene, acetylene."
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          "organic chemistry",
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          "physical chemistry",
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        [
          "noncovalent",
          "noncovalent"
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        [
          "cation",
          "cation"
        ],
        [
          "benzene",
          "benzene"
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        [
          "ethylene",
          "ethylene"
        ],
        [
          "acetylene",
          "acetylene"
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        "(organic chemistry, physical chemistry) A noncovalent interaction between a cation, a positive ion like Li⁺ or Na⁺, and an aromatic residue such as benzene, ethylene, acetylene."
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  ],
  "etymology_text": "From cation + translingual π, where π is from π system. Aromatic residues are called π systems because they contain a lot of π links, links between p electrons.",
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        "A noncovalent interaction between a cation, a positive ion like Li⁺ or Na⁺, and an aromatic residue such as benzene, ethylene, acetylene."
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        "(organic chemistry, physical chemistry) A noncovalent interaction between a cation, a positive ion like Li⁺ or Na⁺, and an aromatic residue such as benzene, ethylene, acetylene."
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