CW31-MCF - Optical activity is the ability of a single...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
CHM 2046/Myers Worksheet 31 April 2, 2010 1. When SF-LS, When WF-HS ?? It depends on the ligand. The ligands can be arranged in order of strength as Lewis bases. This is largely based on observations of the colors of complexes, and is called the Spectrochemical Series. NO 3 - < SO 4 - 2 < I - < Br - < Cl - < F - < H 2 O < NH 3 < en < NO 2 - < CN - (weak LB, small , small Kf) (strong LB, large , large Kf) It depends on the metal ion. Row 4 Row 5 Row 6 It depends on the shape. Octahedral complexes Tetrahedral complexes Square planar complexes Linear complexes 2. The Colors of Complexes. The photons absorbed are a measure of . What is observed, however, is the “opposite” of the absorbed color, white light minus the absorbed photons. We shall observe the color and spectra of several Ni+2 complexes: Complex Color Absorbed Appeared Color Ni(OH 2 ) 6 +2 Ni(OH 2 ) 4 en +2 Ni(OH 2 ) 2 (en) 2 +2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Ni(en) 3 +2 Ni(CN) 4 - 2 3. The Optical Activity of Optical Isomers.
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Optical activity is the ability of a single isomer to rotate the plane of polarized light. We shall observe this effect for a solution of sucrose, common table sugar, which exists in nature as a single optical isomer. One isomer rotates light to the left, and is called the ______________ isomer. The other isomer rotates light to the right, and is called the ______________ isomer. A 50-50 mixture of two mirror image isomers is called a ______________ mixture. Most chemical reactions produce a mixture of isomers. Many biological processes produce (or consume) only one isomer. Study Problem : In Lewis Carrolls book Through the Looking Glass (the sequel to Alice in Wonderland), Alice speculates to her cat about whether looking glass (mirror image) milk would be good to drink. What do you think?...
View Full Document

This note was uploaded on 09/20/2011 for the course CHM 2051 taught by Professor Staff during the Spring '08 term at University of Florida.

Page1 / 3

CW31-MCF - Optical activity is the ability of a single...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online