Unusual Bond Distances in Organic Crystals.

Unusual Bond Activations

The unusual reactivity of hafnocene complexes in comparison to their titanium and zirconium analogues was dramatically demonstrated in the recent functionalization of coordinated N2 and the coupling of CO2 and N2 to a substituted hydrazine product. The differences in their structure and bonding were also noticed; for example, the s and p ratio of the diene bonding in (s-cis-h-diene) metallocene...

Excitons in Organic Molecular Crystals

Topotactic Reactions in Organic Crystals.

Crystalline organic compounds have been observed to react in a number of cases in a manner which suggests that the process is dependent on the geometry of the disposition of reactive groups in the crystal lattice. Such a process, first observed with inorganic reactions, has been designated by Kohlschuetter' as "topochemical," and several criteria may be used to show that a reaction falls into t...

Flexible ferroelectric organic crystals

Flexible organic materials possessing useful electrical properties, such as ferroelectricity, are of crucial importance in the engineering of electronic devices. Up until now, however, only ferroelectric polymers have intrinsically met this flexibility requirement, leaving small-molecule organic ferroelectrics with room for improvement. Since both flexibility and ferroelectricity are rare prope...

Semi Organic Nlo Crystals

The present fascinating field of research is to synthesize, grow and characterize semi organic NLO crystals. Here an attempt has been made to synthesize and grow number of NLO semi organic crystals. The semi organic crystals posses both the good qualities of host organic material and additive-inorganic material. The crystals grown are amino acidγ-Glycine with additives namely, Potassium Nitrate...