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What is difference between dextro and laevo rotation?
Useful definitions:Dextro: RightLaevo: LeftEnantiomer: mirror form of a moleculeChiral: a molecule lacking an internal plane of symmetry that can be found in two non-superimposable mirror forms.The mirror images of a chiral molecule are known as enantiomers, one will be designated Dextro (D-) and the other Laevo (L-).This behaviour is exhibited by organic molecules containing an asymmetric Carbon atom e.g. D-Glucose, L-Cysteine, etc, enzymes are chiral and tend to selectively catalyse a single enantiomer.Chiral molecules that are optically active will rotate plane polarised light passing through them, l- enantiomers will rotate the polarisation to the Left, d- enantiomers will rotate it to the Right.Note the capitalisation L/D refers to the stereochemistry of the molecule relative to that of Glyceraldehyde - l/d tells you which way the polarisation will be rotated. The IUPAC discourages the use of l/d notation as it can be confusing +/- is prefered.
How is a concave mirror shaped differently from a plane mirror?
A normal mirror is flat, like this: l . A concave mirror on the other hand, has a slight inward curve, like this: ( . And, if you're interested, a convex mirror has a slight outward curve, like this: ) . This is to provide a wider view.
What are the three kinds of mirrors and what kind of images do they reflect?
mirrorsconcave (converging) -->)-virtual: enlarged upright image when DoDo>F-real: same size inverted image when Do=C-real: diminished (smaller) inverted image when Do>Cconvex (diverging) -->(-virtual: diminished when Do is anywhereplane (flat) -->l-same size virtualmeanings of lingoDi is distance of image from mirrorDo is distance of object mirrorC is center of curvatureF is focal point "this is between the center of curvature and mirror
Can you use a magnetic needle to find east west direction?
;c,d,lsdcsc szlc s;lc ;lasc ;lsa dsvd;lvdl;,vsdlvl,vlv,l,vllv,dl,vdl,vd,vdl,vdlv;lv,d;lv,dv,dv;l,v,vl;v,l,vlvd;l,vdl,d,dl;v,
Why is it difficult to read the image of a text of a page formed due to reflection by a plane mirror?
There are two reasons. First, we are not used to seeing the mirror image of most letters. The first few times we see the mirror image of a, B, C, c, D, E, e, F, f, G, g, h, J, j, K, k, L, N, P, Q, R, r, S, s, y, Z or z, our brains do not immediately recognize what they are seeing, so it takes extra time to determine of which letter is what we are seeing the mirror image. Second, even after we get used to reading text backwards, when, for example, we see b, we automatically think b instead of d because our brains are still more accustomed to reading forward, so b is a shape we immediately recognize as forward b before we remember that it is also backward d.
What are the optical isomers of d-fructose?
Fructose (and most of Monosaccharides) exist in two enantiomeric forms their structures related as mirror images. 1-d-fructose and 2-l-fructose.
Draw and name the enantiomer of D-glucose?
An enantiomer is a pair of structures which are mirror images of each other. For D-glucose:CHO | CHO| | |H--OH | OH--H| | |OH--H | H--OH| | |H--OH | OH--H| | |H--OH | OH--H| | |CH2OH | CH2OHOn the left is D-glucose, and on the right is L-glucose, mirror images.
Which noncyclic isomers of bromochloropropene are optically active?
CH2= CH - CHCl(Br) this structural isomer exists in two optically active 'd' and 'l' isomers.
What are molecules that share the same chemical formula but have different shapes?
They are called isomers. Isomers may be structural isomers (e.g. 1-propanol and isopropanol) or stereoisomers (e.g. L-aspartic acid and D-aspartic acid).
What is the difference between d ascorbic and L ascorbic acid?
l ascorbic acid and d ascorbic acid are optical isomers of each other. Optical isomers have the same physical and chemical properties but bend the plane of polarisation of polarized light in different directions.It is also called ChiralitySee the related link for more info on optical isomers.
What are the optical isomers of hexan-3-ol?
The 3rd carbon atom in hexan-3-ol is asymmetric so arrange four groups around this carbon atom in two ways the one should be mirror image of other now these are two optical isomers, d-hexan-3-ol and l-hexan-3-ol.
How many isomers of d-ketohexofuranose are possible?
Answer 8 D-isomers of fructose, as I figured out. Of the D-keto-hexoses (like fructose) there are : 8x D-2-ketoses: alpha and beta form of 4 members [D-psicose, D-fructose, D-sorbose, D-tagatose] Not: D-3-ketoses can NOT form furanose ring (4C + O) Not: D-4-ketoses = same as D-3-ketose Not: D-5-ketoses = D-2-ketose At last you can also mention the same set of the (full) enantiomers in L-form: 8x L-2-ketoses: alpha and beta form of [L-psicose, L-fructose, L-sorbose, L-tagatose]
Is ribose an isomer?
They are not isomers because isomers have the same chemical formula with a different structure. These have different formulas ribose is C5H10O5 and deoxyribose is C5H10O4. Deoxy actually means that oxygen is removed.
What are the two main types of lactic acid?
Lactic acid has two optical isomers: L-lactic acid and D-lactic acid.
What is the difference between L amino acid and D amino acid?
L and D amino acids are both optical isomers of each other and only differ in their ability to rotate plane polarized light in opposite directions.
Difference between D L Sugars?
D and L are optical isomer of each other, or non superimposible mirror images. The convention uses Glyceraldhyde as the reference. In a fisher projection the OH of glyceraldehyde is on the right side ( more improtantly in the R configuration)in the D isomer and on the left side ( or the molecule is in the L configuration) in the L isomer. So for all other sugars it looks at the last chiral center for the molecule if the chiral center is R it is a D isomer if the last chiral center is in the S configuration it is an L isomer.
What is difference between dextro and laevo rotation?
Useful definitions:Dextro: RightLaevo: LeftEnantiomer: mirror form of a moleculeChiral: a molecule lacking an internal plane of symmetry that can be found in two non-superimposable mirror forms.The mirror images of a chiral molecule are known as enantiomers, one will be designated Dextro (D-) and the other Laevo (L-).This behaviour is exhibited by organic molecules containing an asymmetric Carbon atom e.g. D-Glucose, L-Cysteine, etc, enzymes are chiral and tend to selectively catalyse a single enantiomer.Chiral molecules that are optically active will rotate plane polarised light passing through them, l- enantiomers will rotate the polarisation to the Left, d- enantiomers will rotate it to the Right.Note the capitalisation L/D refers to the stereochemistry of the molecule relative to that of Glyceraldehyde - l/d tells you which way the polarisation will be rotated. The IUPAC discourages the use of l/d notation as it can be confusing +/- is prefered.
