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Hub AI
Metal carbido complex AI simulator
(@Metal carbido complex_simulator)
Hub AI
Metal carbido complex AI simulator
(@Metal carbido complex_simulator)
Metal carbido complex
A metal carbido complex is a coordination complex that contains a carbon atom as a ligand. They are analogous to metal nitrido complexes. Carbido complexes are a molecular subclass of carbides, which are prevalent in organometallic and inorganic chemistry. Carbido complexes represent models for intermediates in Fischer–Tropsch synthesis, olefin metathesis, and related catalytic industrial processes. Ruthenium-based carbido complexes are by far the most synthesized and characterized to date. Although, complexes containing chromium, gold, iron, nickel, molybdenum, osmium, rhenium, and tungsten cores are also known. Mixed-metal carbides are also known.
Most molecular carbido complexes are clusters, usually featuring carbide as a six-fold bridging ligand. Examples include [Rh6C(CO)15]2−, and [Ru6C(CO)16]2−. Though exceptions exist, such as the nonanuclear Ruthenium cluster (μ-C)Ru9(CO)14 (μ3-η5: η2:η2-C9H7)2, containing a tripped trigonal prism geometry around the carbide.
The iron carbonyl carbides exist not only in the encapsulated carbon ([Fe6C(CO)16]2−) but also with exposed carbon centres as in Fe5C(CO)15 and Fe4C(CO)13.
Bimetallic and exotic clusters such as metal carbide clusterfullerenes (MCCF's) have also been able to be prepared.
Bridging carbido ligands can be subdivided into three classes:
Cumulenic compounds generally bridge two metal atoms of the same element and are symmetrical. However, there are exceptions to this.
In contrast, metallocarbyne compounds are generally constitutionally heterobimetallic, with complexes containing varying coordination geometries being common. These moieties have been able to serve as precursors to elaborate molecular scaffolds such as porphyrin derivatives.
The polar covalent class is distinguished from metallocarbynes by a very fine line. This carbide-metal interaction is considered labile in nature. Carbon here can be understood fundamentally as being similar to CO ligands, that is, dative (L-type). Although, this class has also been described to some extent being analogous to the behavior of Lewis acid adduct-forming terminal nitrido and oxo complexes e.g. (PMe2Ph)2Cl-Re≡N-BCl3 and tBu(CH2)3(Br)W=O-AlBr3.
Metal carbido complex
A metal carbido complex is a coordination complex that contains a carbon atom as a ligand. They are analogous to metal nitrido complexes. Carbido complexes are a molecular subclass of carbides, which are prevalent in organometallic and inorganic chemistry. Carbido complexes represent models for intermediates in Fischer–Tropsch synthesis, olefin metathesis, and related catalytic industrial processes. Ruthenium-based carbido complexes are by far the most synthesized and characterized to date. Although, complexes containing chromium, gold, iron, nickel, molybdenum, osmium, rhenium, and tungsten cores are also known. Mixed-metal carbides are also known.
Most molecular carbido complexes are clusters, usually featuring carbide as a six-fold bridging ligand. Examples include [Rh6C(CO)15]2−, and [Ru6C(CO)16]2−. Though exceptions exist, such as the nonanuclear Ruthenium cluster (μ-C)Ru9(CO)14 (μ3-η5: η2:η2-C9H7)2, containing a tripped trigonal prism geometry around the carbide.
The iron carbonyl carbides exist not only in the encapsulated carbon ([Fe6C(CO)16]2−) but also with exposed carbon centres as in Fe5C(CO)15 and Fe4C(CO)13.
Bimetallic and exotic clusters such as metal carbide clusterfullerenes (MCCF's) have also been able to be prepared.
Bridging carbido ligands can be subdivided into three classes:
Cumulenic compounds generally bridge two metal atoms of the same element and are symmetrical. However, there are exceptions to this.
In contrast, metallocarbyne compounds are generally constitutionally heterobimetallic, with complexes containing varying coordination geometries being common. These moieties have been able to serve as precursors to elaborate molecular scaffolds such as porphyrin derivatives.
The polar covalent class is distinguished from metallocarbynes by a very fine line. This carbide-metal interaction is considered labile in nature. Carbon here can be understood fundamentally as being similar to CO ligands, that is, dative (L-type). Although, this class has also been described to some extent being analogous to the behavior of Lewis acid adduct-forming terminal nitrido and oxo complexes e.g. (PMe2Ph)2Cl-Re≡N-BCl3 and tBu(CH2)3(Br)W=O-AlBr3.