Test
MO5 Bonding and Stereochemistry
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Preguntas del test (7)
1Choose the incorrect statement about sp3 hybridised atoms.
- AAn sp3 hybridised carbon has 4 bonds to it and is tetrahedral.
- BAn sp3 hybridised nitrogen has 3 bonds to it and one lone pair of electrons, and is tetrahedral.
- CAn sp3 hydridised oxygen has 2 bonds to it and one lone pair of electrons, and is tetrahedral.
2An sp hybridised Nitrogen has no lone pair of electrons.
- AVerdadero
- BFalso
3Choose the incorrect statement about sp2 hybridised atom.
- AAn sp2 hybridised carbon is trigonal planar shaped.
- BAn sp2 hybridised oxygen has one bond and two non bonding pairs of electrons.
- CAn sp2 hybridised nitrogen is fully saturated.
4Many drugs are formulated with salts which contain [blank_start]ionic[blank_end] bonds, where the electrons are [blank_start]not shared[blank_end].
- Aionic
- Bcovalent
- Cnot shared
- Dshared
5[blank_start]Stereoisomers[blank_end] are compounds with the same molecular formula and connectivity, but different geometry.
If the compounds can be interconverted by rotation about a single bond, they are [blank_start]conformational[blank_end] stereoisomers. If not, they are [blank_start]configurational[blank_end] steroisomers.
Configurational stereoisomers include:
[blank_start]Geometric[blank_end] Isomers; those around a non rotational double bond, or [blank_start]optical[blank_end] isomers, those around a stereocentre.
Optical isomers include [blank_start]enantiomers[blank_end], which are non superimposable mirror images of each other, and [blank_start]diastereomers[blank_end]; which are not mirror images but are non superimposable isomers.- AStereoisomers
- Bconformational
- Cconfigurational
- DGeometric
- Eoptical
- Fenantiomers
- Gdiastereomers
6Which of these atoms cannot be a chiral centre?
- ACarbon
- BSulfur
- CNitrogen
- DPhosphorus
- EFluorine
7A nitrogen [blank_start]with[blank_end] a lone pair of electrons as the fourth substituent will readily [blank_start]invert[blank_end] at room temperature ie isomers of it cannot be [blank_start]isolated[blank_end]. For nitrogen to act as a [blank_start]stereocentre[blank_end] it cannot have a lone pair of electrons so it must be in the [blank_start]N+[blank_end] form.
- Ainvert
- Bwith
- Cisolated
- Dstereocentre
- EN+
- FN-
Información
- Descripción
- (Molecules) PHCY211 Test sobre MO5 Bonding and Stereochemistry, creado por Mer Scott el 08/04/2018.
- Autor
- Mer Scott
- Idioma
- English
- Visitas
- 13
- Etiquetas
- Valoración
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