CrystEngComm Blog

In this CrystEngComm Hot article, Alicia Beatty and coworkers from the University of Missouri have discovered that sterically demanding groups cause different hydrogen-bonding connectivity in certain lamellar solids. The group looked at 3,5-pyrazole dicarboxylic acid and various amines and explored how this effected the packing of the co-crystals.

Exceptions to the rule: new hydrogen-bonded networks from an old reliable
Onome Ugono, Nigam P. Rath and Alicia M. Beatty
CrystEngComm, 2010, Advance Article
DOI: 10.1039/C0CE00621A, Communication

FREE TO READ until 1st December

An article of interest to CrystEngComm readers from our sister journal Dalton Transactions has been published online.  The article, by Catherine Housecroft and colleagues at the University of Basel, looks at catenanes which use π-stacking interactions.  They show that multiple face-to-face π-stacking of arene and pyridine rings occurs in [FeL₂]²⁺ and [RuL₂]²⁺ (L = 6,6″-bis(4-methoxyphenyl)-4′-phenyl-2,2′:6′,2″-terpyridine) and causes [Fe(2)₂][PF₆]₂ to be high-spin. 

Read more in the full Dalton Transactions article here: 
Towards catenanes using π-stacking interactions and their influence on the spin-state of a bis(2,2′:6′,2″-terpyridine)iron(II) domain
Sven Y. Brauchli, Edwin C. Constable, Kate Harris, Daniel Häussinger, Catherine E. Housecroft, Pirmin J. Rösel and Jennifer A. Zampese
Dalton Trans., 2010, Advance Article
DOI: 10.1039/C0DT00743A, Paper