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Lecture

The Chemistry of Strawberries: Aroma, Color, and Sweetness

In course

CH-120: Advanced general chemistry II

Acquisition des notions fondamentales liées à la réactivité des molécules organiques, identification de la structure de petites molécules organiques au moyen des techniques de spectrométrie de masse, spectroscopie infra-rouge et résonance magnétique nucléa ...

Description

This lecture delves into the compounds responsible for the aroma, color, and sweetness of strawberries, such as anthocyanins and pelargonidin 3-glucoside for color, furaneol and methoxyfuraneol for aroma, and auxin hormones for sweetness. It also explores the importance of organic chemistry in everyday compounds like strawberries, discussing the structure of anthocyanidins and the role of compounds like indole-3-acetic acid in ripening. Additionally, it covers the concepts of configuration, steroisomerism, and conformation, explaining the differences between geometric isomers, diastereoisomers, and enantiomers, and the significance of atom arrangement in space.

Instructors (2)

Jérôme Waser

Jérôme Waser biography and CV's are available on the following website: http://lcso.epfl.ch/waser

Luc Patiny

Official source

Ontological neighbourhood

Chemistry

Physical chemistry: Stereochemistry

Related concepts (32)

Enantiomer

In chemistry, an enantiomer (/ɪˈnænti.əmər, ɛ-, -oʊ-/ ih-NAN-tee-ə-mər; from Ancient Greek ἐνάντιος (enántios) 'opposite', and μέρος (méros) 'part') – also called optical isomer, antipode, or optical antipode – is one of two stereoisomers that are non-superposable onto their own . Enantiomers are much like one's right and left hands, when looking at the same face, they cannot be superposed onto each other. No amount of reorientation in three spatial dimensions will allow the four unique groups on the chiral carbon (see chirality) to line up exactly.

Chirality (chemistry)

In chemistry, a molecule or ion is called chiral (ˈkaɪrəl) if it cannot be superposed on its by any combination of rotations, translations, and some conformational changes. This geometric property is called chirality (kaɪˈrælɪti). The terms are derived from Ancient Greek χείρ (cheir) 'hand'; which is the canonical example of an object with this property. A chiral molecule or ion exists in two stereoisomers that are mirror images of each other, called enantiomers; they are often distinguished as either "right-handed" or "left-handed" by their absolute configuration or some other criterion.

Stereoisomerism

In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. This contrasts with structural isomers, which share the same molecular formula, but the bond connections or their order differs. By definition, molecules that are stereoisomers of each other represent the same structural isomer.

Optical rotation

Optical rotation, also known as polarization rotation or circular birefringence, is the rotation of the orientation of the plane of polarization about the optical axis of linearly polarized light as it travels through certain materials. Circular birefringence and circular dichroism are the manifestations of optical activity. Optical activity occurs only in chiral materials, those lacking microscopic mirror symmetry. Unlike other sources of birefringence which alter a beam's state of polarization, optical activity can be observed in fluids.

Conformational isomerism

In chemistry, conformational isomerism is a form of stereoisomerism in which the isomers can be interconverted just by rotations about formally single bonds (refer to figure on single bond rotation). While any two arrangements of atoms in a molecule that differ by rotation about single bonds can be referred to as different conformations, conformations that correspond to local minima on the potential energy surface are specifically called conformational isomers or conformers.

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Stereochemistry: Understanding Molecular Configurations and Chirality

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Isomers and Chirality: Understanding Coordination Complexes

Discusses isomers, chirality, and the stability of coordination complexes.

Enantiomers: Stereoisomers and Chirality

Explores enantiomers, stereo isomers that are non-superimposable mirror images, and their significance in chemistry.

Organic Chemistry: Isomers and Stereoisomers

Explores isomers, different compounds, and stereoisomers, emphasizing the nomenclature and stereochemistry of organic molecules.

Chirality and Asymmetric Synthesis