Discrimination between S²⁻ and SO²⁻ Sites in Mixed Crystal Compounds Containing Co and Co/Mo Clusters by ⁵⁹Co-NMR Spectroscopy, and the Relevance for HDS Catalysis

In aqueous solutions of the mixed crystal compounds with formal composition K8[Co4-xMoxS4-y(SO)y(CN)12·nH2O (x = 0–2; y = 0–2) i) there are distinct CoS, Co(SO), and Co(SO)2 sites and ii) no hetero-metal clusters are present. These results, revealed by 59Co–NMR, could principally not be disclosed by single crystal X-ray structure analysis. The NMR data also suggest a stable dinuclear cobalt-sulphur cluster in solution. The relevance for HDS catalysis is discussed

ENTRY TO THE CHEMISTRY OF SIMPLE RHENIUM SULFUR COMPLEXES AND CLUSTERS - PREPARATION AND CRYSTAL-STRUCTURES OF R[RES4], R'[RES9], (NH4)4[RE4S22].2H2O, R'2[CL2FE(MOS4)FECL2]X[CL2FE(RES4)FECL2]1-X, R'2[(RES4)CU3I4] AND RR'2[(RES4)CU5BR7](R = NET4, R' = PPH4, X = 0.3, 0.5)

Müller A, Krickemeyer E, Bögge H. Einstieg in die Chemie einfacher Rhenium-Schwefel-Komplexe und -Cluster. Darstellung und Kristall-Struktur von R[RES4], R'[RES9], (NH4)4[RE4S22].2H2O, R'2[CL2FE(MOS4)FECL2]X[CL2FE(RES4)FECL2]1-X, R'2[(RES4)CU3I4] und RR'2[(RES4)CU5BR7](R = NET4, R' = PPH4, X = 0.3, 0.5). Zeitschrift für anorganische und allgemeine Chemie. 1987;554(11):61-78

(PPH4)2(RES4)CU4I5, A COMPOUND WITH A NOVEL ONE-DIMENSIONAL POLYMERIC ANION

Müller A, Krickemeyer E, PENK M. (PPH4)2(RES4)CU4I5, A COMPOUND WITH A NOVEL ONE-DIMENSIONAL POLYMERIC ANION. JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS. 1990;(4):321-322

Calix[4]pyrroles: new solid phase HPLC supports for the separation of anions

A new type of solid support for HPLC separation of nucleotides, oligonucleotides, N-protected amino acids, and perfluorinated biphenyls is revealed in the form of two distinct calix[4]pyrrole-modified silica gels

[MO2(NO)2(S2)3(S5)OH]3-, A COMPLEX CONTAINING A BIDENTRATE S-5(2-)-BRIDGING LIGAND IN A (S5MO2(S2))-HETEROCYCLE WITH CYCLOOCTASULFUR GEOMETRY

Müller A, ELTZNER W, Bögge H, Krickemeyer E. [MO2(NO)2(S2)3(S5)OH]3-, A COMPLEX CONTAINING A BIDENTRATE S-5(2-)-BRIDGING LIGAND IN A (S5MO2(S2))-HETEROCYCLE WITH CYCLOOCTASULFUR GEOMETRY. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH. 1983;22(11):884-885

Discrimination between S2- and SO2- Sites in Mixed Crystal Compounds Containing Co and Co/Mo Clusters by 59Co-NMR Spectroscopy, and the Relevance for HDS Catalysis

Müller A, Krickemeyer E, Bögge H, Rehder D. Discrimination between S2- and SO2- Sites in Mixed Crystal Compounds Containing Co and Co/Mo Clusters by 59Co-NMR Spectroscopy, and the Relevance for HDS Catalysis. CHIMIA. 1992;46(9):386-388.In aqueous solutions of the mixed crystal compounds with formal composition K8[Co4-xMoxS4-y(SO)y(CN)12].nH2O (x = 0-2; y = 0-2) i) there are distinct CoS, Co(SO), and Co(SO)2 sites and ii) no hetero-metal clusters are present. These results, revealed by Co-59-NMR, could principally not be disclosed by single crystal X-ray structure analysis. The NMR data also suggest a stable dinuclear cobalt-sulphur cluster in solution. The relevance for HDS catalysis is discussed

Molybdenum blue: A 200 year old mystery unveiled

Müller A, Meyer J, Krickemeyer E, Diemann E. Molybdenum blue: A 200 year old mystery unveiled. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH. 1996;35(11):1206-1208

CHARACTERIZING AN UNUSUAL GIANT CLUSTER ANION WITH 276 ATOMS BY INVESTIGATION OF THE INFLUENCE OF DIFFERENT CATION LATTICES SYNTHESIS AND CRYSTAL-STRUCTURE OF (NH4)15[MO57FE6(NO)6O174(OH)3(H2O)24]CENTER-DOT-73H2O

Müller A, Bögge H, Krickemeyer E, Dillinger S. CHARACTERIZING AN UNUSUAL GIANT CLUSTER ANION WITH 276 ATOMS BY INVESTIGATION OF THE INFLUENCE OF DIFFERENT CATION LATTICES SYNTHESIS AND CRYSTAL-STRUCTURE OF (NH4)15[MO57FE6(NO)6O174(OH)3(H2O)24]CENTER-DOT-73H2O. BULLETIN OF THE POLISH ACADEMY OF SCIENCES-CHEMISTRY. 1994;42(3):291-298.The compound (NH4)15[Mo57Fe6(NO)6O174(OH)3(H2O)24].73H2O (1) containing a giant cluster anion (molecular mass: 9251.0 g mol-1) has been synthesized and characterized by a single-crystal X-ray investigation. Compound 1 crystallizes in the space group P6(3)/mmc with the unit cell dimensions a = 23.730(7) angstrom, c = 27.312(10) angstrom, V = 13319(7) angstrom 3 (R = 0.104 for 2433 independent reflections). The results obtained here for a new cation lattice, give useful information for the knowledge of the giant cluster anion containing 276 non-hydrogen atoms, because its electron distribution in the HOMO region seems to be influenced by the cation lattice. Only little is known up to now about electronic structures of giant transition metal clusters

Synthesis and structural characterization of a monofunctionalized phloroglucin-derivative: A precursor for heterotrinuclear meta-phenylene bridged complexes

Glaser T, Heidemeier M, Krickemeyer E, Bögge H. Synthesis and structural characterization of a monofunctionalized phloroglucin-derivative: A precursor for heterotrinuclear meta-phenylene bridged complexes. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES. 2006;61(6):753-757.As part of our synthetic efforts for new triplesalen derivatives, we reacted 2,4,6-triacetyl-1,3,5-trihydroxybenzene (1) with excess Cu(ClO4)(2) center dot 6H(2)O, imidazole, and ethylenediamine. However, not the triple ketimine derivative was formed but the mononuclear Cull complex [LCuII(ImH)jClO(4) center dot 0.5EtOH center dot 0.5H(2)O (HL = 6-(1-(2-aminoethylimino)ethyl)-2,4-diacetyl-1,3,5-trihydroxybenzene) with only one ketimine function. This complex forms a one-dimensional coordination polymer in the solid state through the apical binding of a keto-oxygen atom of one cation to the Cu-II ion of a neighboring cation. Magnetic measurements reveal the presence of weak antiferromagnetic intra-chain interactions

FIXATION OF THE DITHIOSULFATE ION S3O22- - PREPARATION, CRYSTAL-STRUCTURE, AND ESCA SPECTRUM OF (PPH4)2[(S2)OMOS2MOO(S3O2)]

Müller A, REINSCHVOGELL U, Krickemeyer E, Bögge H. FIXATION OF THE DITHIOSULFATE ION S3O22- - PREPARATION, CRYSTAL-STRUCTURE, AND ESCA SPECTRUM OF (PPH4)2[(S2)OMOS2MOO(S3O2)]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH. 1982;21(10):796-797