Dicarbonyl(cyclopentadienyl)mangan‐Cluster mit SbCl‐und SbCl₂‐Brückenliganden

Abstract

SbCl3 läßt sich mit C5H5(CO)2MnTHF in THF partiell enthalogenieren. Je nach den Reaktionsbedingungen entsteht [(C5H5 (CO)2Mn)2 SbCl]Mn(CO)2C5H5 (2), die erste Verbindung mit einem cyclischen Dimetallastiban‐Liganden, oder der offenkettige Komplex C5H5(CO)2 ‐Mn‐SbCl2C5H5(CO)2 MnSbCl2Mn(CO)2C5H5 (3). In 3 sind beide Antimonatome des im freien Zustand unbekannten trans‐Dicarbonyl(cyclopentadienyl)bis(dichlorstibino)mangan‐Liganden, C5H5(CO)2(SbCl2)2Mn, an je eine C5H5(CO)2 Mn‐Einheit gebunden. Synthese, Eigenschaften und Röntgenstrukturanalyse von 2 und 3 werden beschrieben.

Analysis of Stereochemical Nonrigidity in Five-Coordinate Cyclopentadienylmetal Complexes by the Structure Correlation Method

“…Two of the complexes, [(η 5 -C 5 H 4 COMe)V(CO) 4 ] 12 and [PhMe 3 N][(η 5 -C 5 Me 5 )MoI 4 ], are close to square-pyramidal geometry. However, the other complexes [(η 5 -C 5 H 4 Me)Cr(CO) 3 ] 2 , [(η 5 -C 5 H 5 )Mo(CO) 3 ] 3 Ta, and [(η 5 -C 5 H 5 )Mn(CO) 2 {(η 5 -C 5 H 5 )Mn(CO) 2 SbCl 2 }] show an appreciable distortion along the Berry pathway. The reason for the very small δ 46 angle is that at least one of the metal−ligand bonds is significantly longer than the others, which results in a “distorted” dihedral angle measurement.…”

Unconventional multiple bonds: coordination compounds of unstable Vth main group ligands

“…This 3-center-4'it'-model (4 electrons from the two metal atom lone pairs, no electron from the empty X-p valence orbital) is consistent with the properties of (LM)2XR compounds: It explains 1. the trigonally planar coordination of X 2. the short X---M bonds 3. the y_VIS spectra 4. the P-NMR shifts of (LM)2PR Structure, Spectra. The trigonally planar coordination with short M--X bond lengths is common to all (LM)2XR compounds (2)(3)(4)(5)(7)(8)(9)(10)(11)(12)(18)(19)(20)22). If L M has7t-orbitals of different donor quality (e.g.…”

“…The forward reaction is observed for ((C0)5Cr)2PR (8,40) (42) as is Cl-in (Cp(C0)2Mn)3SbC1 (12) while Cl-u gives the "-inidene" type dinuclear compound (11,12,17).…”

Manganese Telluride Carbonyl Complexes: Facile Syntheses and Exotic Properties—Reversible Transformations, Hydrogen Generation, Paramagnetic, and Semiconducting Properties

“…Manganese, the third most abundant transition metal on Earth, can form a wide variety of Mn-based compounds that usually exhibit unique chemical properties and significant applications in magnetism, catalysis, and nanoscience, mainly due to their varied oxidation states ranging from −3 to +7. Although these types of mononuclear manganese compounds have been subjects of extensive research, information on polynuclear manganese carbonyl clusters is considerably limited. − Despite the technical challenges associated with the synthesis of polynuclear manganese carbonyl clusters, the development of such complexes still has attracted much attention in the field of transition metal cluster chemistry, due to the important applications of the manganese carbonyl complexes in CO 2 reduction, catalysis, and supramolecular construction …”

“…To overcome the synthetic challenges of polynuclear Mn–CO clusters, the introduction of main-group elements into transition metal carbonyl clusters has proven to be an important synthetic strategy, which not only stabilizes the resulting metal complexes but also allows their physical and chemical properties to be fine-tuned. − , Among these reports, Adams et al. and others found that the disulfido group was a suitable ligand for stabilizing the manganese disulfide carbonyl complex, Mn 2 (CO) 7 (μ-S 2 ) .…”