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Fe­(III) porphyrins bridged with 1,2,3-triazole ligands were synthesized. Upon deprotonation, the triazolate ion coordinates to the Fe­(III) ion, forming an overall neutral high-spin Fe­(III) porphyrin in which the triazolate serves both as an axial ligand and as the counterion. The second axial coordination site is activated for coordination and binds p-methoxypyridine, forming a six-coordinate low-spin complex. Upon addition of a phenylazopyridine as a photodissociable ligand, the spin state of the complex can be reversibly switched with ultraviolet and visible light. The system provides the basis for the development of switchable catalase- and peroxidase-type catalysts and molecular spin switches.

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The first two examples!a of novel lipophilically-wrapped polyion aggregates,2 in which a cluster of cations and anions provides thermodynamical stability and a kinetically persistent impenetrable hydrocarbon skin, have both been discovered serendipitously: the (octahedron + prismane) polyhedron (1) crystallized after addition of ra-butyllithium to the solution obtained from dissolving barium metal in ferf-butyl alcohol (1), and the hexameric sodium imido diphosphonate was prepared by reacting the tetraphenoxydiphosphonate inline with NaH in benzene (2): {[Ba2%Li+3O£-2]11+(-OC(CH3)3)"(0C4Ha)3}(2) {(H5C60)24(0PNP0Na+S6}

IR and Raman spectra of [Ru(NH3)5(N2O)]Br2 and [Ru(NH3)5(N2O)](BF4)2 and of the corresponding 15 NNO labeled complex are presented and assigned with the help of normal coordinate analysis (NCA) and density functional (DFT) calculations. The results unambiguously show that the N 2 O ligand is end-on terminally bonded via the N atom to Ru II . Nitrous oxide is found to act as an extremely weak ligand to Ru II . The results are compared in detail with spectroscopic and electronic properties of the NO complex [Ru(NH3)5(NO)]Br3. -(PAULAT, F.; KUSCHEL, T.; NAETHER, C.; PRANEETH, V. K. K.; SANDER, O.; LEHNERT*, N.; Inorg.