as indicated by a little "D" subscript when giving polarimeter rotation angles for enantiomers?
2007-06-02 15:29:09 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
The sodium D line, which has a wavelength of 589 nanometers, is the "light bulb" source used to power polarimeters. Enantiomers rotate the plane of plane-polarized light by a certain number of degrees of rotation. But that depends on the wavelength of the light. For the "absolute rotation," every one has agreed on the sodium D line. It's intense yellow. You saw it in your general chem. course when you stuck a piece of platinum or nichrome wire in NaCl and then into a gas flame.
2007-06-02 15:47:12 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
Sodium D Line
2016-11-06 23:46:58 · answer #2 · answered by ? 4 · 0⤊ 0⤋
In the sodium spectrum there is a doublet hence the letter D. The line of the doublet at 589 nm is the most intense of the two. The other being at 589.6 nm
2007-06-02 15:51:48 · answer #3 · answered by Anonymous · 0⤊ 0⤋
sodium D Line is the" Doublet" of plane polarised light of angle of rotation in between two beams(Dextro&Leavo) at 589 nm in high pressure sodium vapour lamp causes broader spectrum
2015-02-11 16:42:38 · answer #4 · answered by prathap 1 · 0⤊ 0⤋