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  2. Acetyl group - Wikipedia

    en.wikipedia.org/wiki/Acetyl_group

    In IUPAC nomenclature, an acetyl group is called an ethanoyl group. An acetyl group contains a methyl group ( −CH 3 ) that is single-bonded to a carbonyl ( C=O ), making it an acyl group . The carbonyl center of an acyl radical has one non-bonded electron with which it forms a chemical bond to the remainder (denoted with the letter R ) of the ...

  3. Acetal - Wikipedia

    en.wikipedia.org/wiki/Acetal

    Generic structure of acetals. In organic chemistry, an acetal is a functional group with the connectivity R 2 C(OR') 2.Here, the R groups can be organic fragments (a carbon atom, with arbitrary other atoms attached to that) or hydrogen, while the R' groups must be organic fragments not hydrogen.

  4. Collective mental state - Wikipedia

    en.wikipedia.org/wiki/Collective_mental_state

    Group dynamics – System of behaviors within or between social groups; Group mind (science fiction) – Plot device used in science-fiction stories; Groupthink – Psychological phenomenon that occurs within a group of people; Identity (social science) – Qualities, beliefs, personality, looks and/or expressions that distinguish a person or group

  5. Functional group - Wikipedia

    en.wikipedia.org/wiki/Functional_group

    Functional group interconversion can be used in retrosynthetic analysis to plan organic synthesis. A functional group is a group of atoms in a molecule with distinctive chemical properties, regardless of the other atoms in the molecule. The atoms in a functional group are linked to each other and to the rest of the molecule by covalent bonds.

  6. Principles of grouping - Wikipedia

    en.wikipedia.org/wiki/Principles_of_grouping

    The principles of grouping (or Gestalt laws of grouping) are a set of principles in psychology, first proposed by Gestalt psychologists to account for the observation that humans naturally perceive objects as organized patterns and objects, a principle known as Prägnanz. Gestalt psychologists argued that these principles exist because the mind ...

  7. Acetylation - Wikipedia

    en.wikipedia.org/wiki/Acetylation

    Salicylic acid is acetylated to form aspirin. In chemistry, acetylation is an organic esterification reaction with acetic acid.It introduces an acetyl group into a chemical compound.

  8. Metapsychology - Wikipedia

    en.wikipedia.org/wiki/Metapsychology

    Metapsychology (Greek: meta 'beyond, transcending', and ψυχολογία 'psychology') [2] is that aspect of a psychological theory that discusses the terms that are essential to it, but leaves aside or transcends the phenomena that the theory deals with.

  9. Group Psychology and the Analysis of the Ego - Wikipedia

    en.wikipedia.org/wiki/Group_Psychology_and_the...

    Group Psychology and the Analysis of the Ego (German: Massenpsychologie und Ich-Analyse) is a 1921 book by Sigmund Freud, the founder of psychoanalysis. In this monograph, Freud describes psychological mechanisms at work within mass movements .