Using stopped flow and other spectroscopic techniques, the thermodynamic parameters of the coupling reaction between 1,3-dimesitylimidazolylidene and phenyl isothiocyanate were determined (H(o) = -96.1 kJ mol(-1) and ΔS(o) = -39.6 J mol(-1) K(-1)). On the basis of these data which indicated that the reaction was reversible (K(eq) = 5.94 × 10(14) M(-1) at 25 °C; k(f) = 252 M(-1) s(-1); k(r) = 4....

The reaction of chlorosulfonyl isocyanate (CSI) with alkenes provides beta-lactams in quantity, and the products have frequently been used for ring-opening polymerization to generate nylon-3 materials. Prior uses of this approach have focused almost entirely on beta-lactams with purely hydrocarbon substitutents. We show how a variety of beta-lactams bearing protected polar substituents can be g...

Many of the advances in material performance over the last decade can be attributed to developments in multicomponent polymer systems and specifically, to multiphase materials such as incompatible polymer blends and fibre-reinforced composites. In these types of material, performance properties are often dominated by the interphase that defines the transition region from one pure phase to anoth...

This work describes reactions of heteroallenes with diamido-diamine cyclam-based Zr(iv) complexes of the general formula (Bn2Cyclam)ZrX2 (X = O(t)Bu, , O(i)Pr, , SPh, , NH(t)Bu, ) as well as the di-orthometallated species ((C6H4CH2)2Cyclam)Zr, . The reactions of isocyanates or isothiocyanates with , or resulted in the formation of N-bonded ureate or thioureate cyclam complexes upon [2 + 2] cycl...

The title compound, C(14)H(12)N(4)O(4), was prepared by the reaction of 2-nitro-phenyl isocyanate with benzoyl-hydrazine. The dihedral angle between the rings is 71.49 (6)) Å. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond, generating an S(6) ring. The crystal packing shows N-H⋯O hydrogen bonds.

A simple versatile route to polyrotaxanes with a variety of topologies is described through the synthesis and subsequent polymerization of readily accessible and stable rotaxane monomers containing bulky blocked isocyanate stopper groups. Link to download paper: http://onlinelibrary.wiley.com/doi/10.1002/anie.200351458/abstract