Inorganic & Quantum Chemistry

 

 

 

News

 

New Species / High Oxidation States

Formation and Characterization of the
IrO4 with Ir in the Oxidation State +VIII

 

A state of eight: Iridium atoms insert into dioxygen to form iridium dioxide molecules in solid noble-gas matrixes. Annealing allows formation of the iridium dioxide superoxide complex [(1-O2)IrO2], which isomerizes under IR irradiation to the iridium dioxide peroxide complex [(2-O2)IrO2]. These complexes photochemically rearrange to the more stable iridium tetroxide molecule with an iridium oxidation state of +VIII.

 

Publication in Angew. Chem.

C&EN reports about Iridium VIII as IrO4

IrVIII wieder im Rennen

 

New Species / High Oxidation States

Mercury Tetrafluoride Synthesized

 

After almost 20 years, we report the discovery of a new oxidation state in the periodic table. Our experiments show the first evidence for HgF4 in solid neon by IR spectroscopy, after reaction of mercury with excess fluorine under mercury arc irradiation and subsequent annealing.

In its tetravalent oxidation state, mercury is a true transition metal that utilizes 5d-orbitals fully in bonding.

 

VIP-Publication in Angew. Chem.

C&EN reports about Mercury Tetrafluoride

Quecksilber: ein echtes Übergangsmetall

Quecksilber kann auch mit vier Partnern - HP Uni-Würzburg

HgF4 at psichem.de

 

High Oxidation States

After 20 Years, Theoretical Evidence that "AuF7" is Actually AuF5· F2

 

Our calculations indicate clearly that the species claimed to be AuF7 had not been synthesized. Instead, a new gold fluoride complex AuF5·F2 was prepared.


 

Inorg. Chem. 2007, 46, 5338

Gold in the news "Au(VII) is not." Gold Bulletin, 2007,40, 252

 

 

 

Conferences

 

Quantum Chemistry

Start:
Saturday 25. September. 2010
End:
Wednesday 29. September. 2010

Organisers:
Peking University,
Beijing, China

 http://162.105.22.250/index.php

Fluorine Chemistry

Start:
Sunday 9. January 2011
End:
Friday 14. January 2011

Location:
St. Pete Beach, FL, USA

 http://fluorine.sites.acs.org/20thwfc.htm

 

Matrix-Isolation Technique

 

Start:
Sunday 22. August 2010
End:
Friday 27. August 2010

Location:
Yerevan, Armenia