Showing papers by "Martin Lutz published in 1998"
TL;DR: The reaction of partially condensed silasesquioxanes of the type [R17Si7O9(OH)2(OR2)] with either [Pt(dppe)(CO3)] or [Ptiplppe)Cl2]/Ag2O leads to the formation of [R 17Si7 O9(OR 2)O2Pt (dppe)], crystallographically characterised for R1 = c-C5H9; R2 = SiMe3, providing unprecedented routes to late transition metal silasesQUioxane complexes as mentioned in this paper
30 citations
TL;DR: The complex is a first generation structural model for [Fe]-only hydrogenases; it incorporates both a sulfur-rich environment and coordinated carbon monoxide ligands, as observed in [NiFe]-hydrogenases.
Abstract: Different spin states characterize the two Fe atoms in the unique asymmetric dinuclear complex 1, as confirmed by Mossbauer spectroscopy. The complex is a first generation structural model for [Fe]-only hydrogenases; it incorporates both a sulfur-rich environment and coordinated carbon monoxide ligands, as observed in [NiFe]-hydrogenases. The IR vibrations of the carbonyl ligands in 1 compare well with those of the [Fe]-only hydrogenases.
27 citations
TL;DR: This work reports the first 1,4-addition of a phosphinidene complex to an unsaturated system, the first addition of a phosphate complex to a benzene ring, and the first [4+1] cycloaddition to an aromatic compound.
Abstract: Three novel aspects emerge for the reaction of [5]metacyclophane (1) with the (intermediate) phenylphosphinidene complex 2 to give the 7-phosphanorbornadiene 3. It is the first 1,4-addition of a phosphinidene complex to an unsaturated system, the first addition of a phosphinidene complex to a benzene ring, and the first [4+1] cycloaddition to an aromatic compound.
21 citations
11 citations
TL;DR: The 1-aza-2-azoniaallene salt as mentioned in this paper was obtained from 3-acetyl coumarin via the hydrazone 6 and the (chloroalkyl)azo derivative 7 reacts with nitriles to afford the 3-(3-chromenyl)-1,2,4-triazolium salts 11a-d.
Abstract: The 1-aza-2-azoniaallene salt 8 prepared from 3-acetyl coumarin via the hydrazone 6 and the (chloroalkyl)azo derivative 7 reacts with nitriles to afford the 3-(3-chromenyl)-1,2,4-triazolium salts 11a–d. With diisopropylcarbodiimide the triazolium salt 13 and with norborene a tricyclic pyrazolium salt 14 are obtained. Concurrent to these cycloadditions the by-product 12 is formed by intramolecular cyclization of the cumulene 8. Similarly, the intramolecular cyclization product 18 is isolated as the sole product when the 1-aza-2-azoniaallene salt 17a (prepared from the ethyl carbazone of camphor by chlorination and treatment of the product 16a with SbCl5) was treated with nitriles, carbodiimides or alkenes. In contrast, 1,2,4-triazolium salts 20a–c, 23c, respectively pyrazolium salts 20d–f, and 1,3,4-thiadiazolium salts 23a,b are obtained by reaction of the 1-aza-2-azoniaallene salt 17b with nitriles, respectively alkenes, alkynes, diisopropylcarbodiimide, and isothiocyanates. The constitutions of two of these products (20e, 23a) were secured by X-ray structural analysis.
6 citations
4 citations