Lutetium analog

NMR data for half-sandwich rare-earth phthalocyanines are extremely rare. Ni et al. (1987) have measured the H and C NMR spectra of a series of R(Pc)(OAc)2H (R=Sm-Lu) and R(Pc)Cl (R=Er-Lu). Due to the intrinsic nature of the metal ions, the signals for the a and (3 protons of the phthalocyanine ring span a wide region. Figure 18 shows the variation of H NMR shift of the a protons and the OAc methyl protons in R(Pc)(OAc)2H (R=Sm-Yb) relative to those of the diamagnetic lutetium analog. It is noted that the A<5a/A<5(5 values remain almost constant for these complexes, showing that the shifts are mainly due to a dipolar contribution. 

It ignites in air, as do the analogous derivatives of lutetium and other lanthanoids... 

Panigone S, Nunn AD. Lutetium-177-labeled gastrin releasing peptide receptor binding analogs a novel approach to radionuclide therapy. Quart. J. Nucl. Med. Mol. Imaging 2006 50 310-321. 

All the catalysts had limited lifetimes (minutes) under the exothermic conditions of these polymerizations. Complete details of chain termination proceeses are not known. Within experimental error analogous lutetium and ytterbium complexes had very similar activities and lifetimes. It can be estimated from the data that the intrinsic ethylene propagation rate is faster than that for propene by a factor of >10. ... 

Element 103 should complete the actinide series of heavy rare earth elements. It should be analogous in its chemical properties to the rare earth lutetium. 

The first molecular structure of half-sandwich lanthanide porphyrins was reported by Schaverien and Orpen (1991). The lutetium alkyl complex Lu(OEP)[CH(SiMc3)2] has a structure resembling that of the scandium analog (Arnold et al. 1993), exhibiting a square pyramidal geometry. The five-coordinated lutetiiun atom lies 0.918 A above the N4 plane, and the porphyrin ring also displays a saucer shape. 

Some poly(oxyethylene)-substituted lutetium phthalocyanine complexes ((9) Ln = Lu, R = 0(CH2CH20) CH3, n=l-4) were prepared, but only one compound was mesomorphic ( = 3), exhibiting a Cok phase between 53 °C and 58 The analogous compounds with... 

---