𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Direct observation of the ring current in a π-arenetricarbonyl chromium (0) complex

✍ Scribed by Leonard S. Keller

Publisher
Elsevier Science
Year
1978
Tongue
French
Weight
206 KB
Volume
19
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

The origin of the unusual 2.0-2.5 ppm upfield chemical shift of the aroma-

No. 27

The pertinent chemical shift data are given in Table I.

As expected, an upfield shift of 1.99 ppm in the positions of the aromatic protons does occur in going from the uncomplexed to the complexed system. However, a similar comparison of the chemical shifts of H a and H b in both systems shows virtually no change in the chemical shifts of these protons in the two molecules. TABLE I. -Chemical Shifts (ppm 6)4 ,, , ,, , Free Arene i Complex II A

📜 SIMILAR VOLUMES

Alternating Right- and Left-Handed Helic
Alternating Right- and Left-Handed Helical Loops in a Self-Assembled Polymer: Direct Observation of Ring-Opening Polymerization of a Macrocyclic Gold Complex
✍ Zengquan Qin; Michael C. Jennings; Richard J. Puddephatt 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 108 KB 👁 2 views

Reaction of the ligand NN'-bis(pyridin-3-yl)-1,3-benzenedicarboxamide (1) with the diphosphanedigold(I) complex [(mu-PP)(AuO2CCF3)2] occurred by displacement of the trifluoroacetate ligands by the pyridyl groups of 1, and crystallization gave the macrocyclic complex [Au2(mu-PP)(mu-1)](CF3CO2)2 (2b),

Direct Observation of Ground State Split
Direct Observation of Ground State Splitting in the Chromium(III) Acetate Trimer by Inelastic Neutron Scattering
✍ Dr. Upali A. Jayasooriya; Dr. Roderick D. Cannon; Dr. Ross P. White; Dr. Gordon 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 325 KB 👁 2 views

Scheme 2. a) 1. Bu,NF/DMF/l h, 2. (S)-Alanine-(2-trimethylsilylethyl)ester~ EDCl/hydroxybenzotriazole/CHzC12/-15 to 20"C/14 h, 82%. b) 1. Bu NF/DMF/l h, 2. C,F,OH/EDCI/CH,CI,/ -15 to 20 "C/14 h. c) 1. M&iOSO,CF,/CH,CI,/ -40 to 20 "C/2 h, 2. CHClJsat. NaHCOJ20 "C/3 h. 80%. d) 1. MelSiOS0,CF,/CH,C12/-

ChemInform Abstract: Reactions of Comple
ChemInform Abstract: Reactions of Complex Ligands. Part 78. [2 + 1] Cycloadditions of Diazoalkanes to Enol Ethers Catalyzed by Chromium Complexes — The First Direct Spectroscopic Observation of a Carbene Complex Intermediate.
✍ J. PFEIFFER; K. H. DOETZ 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v