Standard practices for Fmoc-based solid-phase …

An Introduction to Fluorescence Spectroscopy

An Introduction to Fluorescence Spectroscopy 3 Table of Contents ... molecular extinction coefficient of the compound; in other words, the corrected

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CHAPTER 10: COORDINATION CHEMISTRY II: BONDING

10.8 Co(II) is d 7. In tetrahedral complexes, it is generally high spin and has 3 unpaired electrons; in In tetrahedral complexes, it is generally high spin and has 3 unpaired electrons; in octahedral complexes, it is also typically high spin and also has 3 unpaired electrons; in square

  Chapter

Dynamic Light Scattering Training

www.atascientific.com.au Mie Theory › Mie theory is an exact description of how spherical particles of all sizes and optical properties scatter light › When particles become larger than /10, the scattering changes from being isotropic to a distortion in the

Introduction to Kinetics and Equilibrium

Introduction to Kinetics and Equilibrium Kinetics and equilibrium are two of the most ... At iitill tii lPClA system initially containing only PCl 5 at t ti f 0 100t a concentration of 0.100 M has a Q c = 0, which is less than 0.030. What are the equilibrium concentrations

  Introduction

Introductionto FourierTransform InfraredSpectrometry ...

of material present. With modern software algorithms, infrared is an excellent tool for quantitative analysis. Older Technology. The original infrared instruments were of the . dispersive. type. These instruments separated the individual frequencies of energy emitted from the infrared source. This was accomplished by the use of a prism or grating.

  Software

Raman spectroscopy

From the Renishaw Raman software the user can select: • a fixed grating measurement with a spectrum 'window' of 400 cm-1 to 1000 cm (configuration dependent) • a unique 'extended scanning' facility allowing the user to choose any Raman shift range up to about 10000 cm-1 (configuration dependent). Essential for extended range

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A Second Application of Symmetry

We can use character tables to determine the symmetry of all 18 motions and then assign them to translation, rotation, or vibration. We can also tell which vibrations are IR or Raman active. Procedure: 1. Assign x,y,z coordinates to each atom. 2. Determine how each axis transforms for every class of symmetry operation in the group.

  Determine

Coordination Chemistry II: Ligand Field Theory Continued

Coordination Chemistry II: Ligand Field Theory Continued Chapter 10 Wednesday, November 25, 2015. Adding Metal Electrons e g e g * a1g a1g * t1u t1u * t2g Metal ions typically have some valence electrons that can be accommodated in the metal d …

  Chemistry

Zinc-EDTA Titration

Zinc-EDTA Titration You would like to perform a titration of 50.00 mL of a 1.00 x 10-4 M Zn2+ solution with a 1.00 x 10-4 M EDTA solution. What is pZn at the equivalence point? Log K f for the ZnY2-complex is 16.5. Both solutions are buffered to a pH of 10.0 using

  Titrations

A Guide to Recording Fluorescence Quantum Yields

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Chapter 3 Protecting Groups - chem.usu.edu

Chapter 3: Protecting Groups ... relatively strong acid (TFA) to remove * Stable in basic conditions * The reagent, MOMCl, is considered carcinogenic Reagent/Condition Reference MOMCl, NaH in THF or ... Protecting Groups of Amino Groups (i) Masking NH2 (amino) as N3 (azido)

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Coupling Reagents - Bachem

Coupling Reagents 2. COUPLING REAGENTS AND . ... amino acid. PG, PG’: protecting groups. Act: activating group. Coupling Reagents 4 tendency to racemize considerably. Ure-thane derivatives, which include standard α-amino protecting groups as Fmoc, Boc, and Z, of amino acids usually retain their optical purity upon …

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1,2-Dimethylindole-3-sulfonyl (MIS), the Most Acid- …

amino acid side chains are protected by trifluoroacetic acid (TFA)-labile protecting groups, usually tBu derivatives; and the C-terminal amino acid is anchored to the solid support through a TFA-labile

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ORTHOGONALITY OF PROTECTING GROUPS - …

ORTHOGONALITY OF PROTECTING GROUPS ... the amino-protecting group intact. On the other hand, the pairs Boc/OPp or Fmoc/ ivDde are merely quasi-orthogonal because both groups are acid-labile or cleaved by bases, respectively. OPp can be removed selectively in the presence of Boc/tBu by

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Safety-Catch Protecting Groups in Peptide Synthesis

"SAFETY-CATCH" PROTECTING GROUPS IN PEPTIDE SYNTHESIS* Marcel PATEK and Michal LEBL ... which makes this amino acid more difficult to couple and cleave. Both amino acid ... are earlier studies of Okamoto and Brownz1 which utilized the Hammett equation

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Solid Phase Peptide Synthesis, Strategies and Resins

Side Chain Protecting Groups Ser, Thr, Tyr: Ether tert-Butylether Asp and Glu: tert-Butylester Lys: boc-protecting group protects the reactive functional group of the amino acid Öprevents formation of branched chains permanent, orthogonal, compatible with Nα-protection Öremain attached troughout the synthesis easy to remove (with acid) after …

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New Methods in Peptide Synthesis. Part 111.l …

New Methods in Peptide Synthesis. Part 111.l Protection of Carboxyl Group By G. C. Stelakatos, A. Paganou, ... The protecting groups more commonly used so far ... behaviour of O-benzyl and O-tritryl groups. Amino- acid …

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Amino Acid-Protecting Groups - UB

involve a carboxylic acid-protecting group which is removed upon amino protection and those that involve less reactive electrophiles on the reagent used to introduce the protecting group. An example of the former is the use of trimethylsilyl esters of amino acids prepared in

  Group, Acid, Protecting, Amino, Amino acid protecting groups

Protecting Groups Handout A - University of Houston

Protecting Groups Hydroxyl Protection Methyl Ethers Formation: ... AlBr 3,EtSH PhSe-Ph 2P-Me 3SiI Stable to Acid and Base CH 2N 2, SiO 2 or HBF 4 NaH, MeI, THF Methylthiomethyl Ethers (MTM) Formation: Stability: Cleavage: MeSCH 2Cl, NaH, THF Stable to base and mild acid ... protecting primary over secondary alcohols. Mild Acid …

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PROTECTING GROUPS 57 Smith: Chapter 7

PROTECTING GROUPS 58 Methoxyethoxymethyl ethers (MEM) R-OH → R-OCH2OCH2CH2OMe stable to base and mild acid Formation: - MeOCH2CH2OCH2Cl, NaH, THF - MeOCH2CH2OCH2Cl, CH2Cl2, iPr2EtN TL 1976, 809 Cleavage - Lewis acids such as ZnBr2, TiCl4, Me2BBr2 C 5 H 11 O MEM-O

  Group, Acid, Protecting, Protecting groups