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While the first dinitrogen complex was discovered in 1965, [1] reports of dinitrogen complexes of main group elements have been significantly limited relative to their transition metal complex analogues. Examples span both the s- and p- blocks, with particular breakthroughs in Groups 1, [2] 2, [3] 13, [4] 14, [5] and 15 [6] in the periodic
Repeating the same reaction but replacing Dur (2,3,5,6-tetramethyl-phenyl) group by a bulkier Tip (2,4,6-triisopropylphenyl) group resulted in a very different result: after the dinitrogen was coordinated by the first borylene molecule, the second coordination by another borylene molecule was considerably hindered by steric repulsion in the ...
When the alkyl group bridges two main group elements, the bonding is called three-center two-electron bonds. This pattern is seen for dimethyl beryllium and trimethylaluminium. In the case of methyl lithium, the methyl group can be shared (bonded to) three Li centers. These bonding aspects influence the structures: Trimethylaluminium, dimethyl ...
Intended for main group thermochemistry and non-covalent interactions, transition metal thermochemistry and organometallics. It is usually the most versatile of the 06 functionals [ citation needed ] , and because of this large applicability it can be slightly worse than M06-2X for specific properties that require high percentage of HF exchange ...
Sometimes groups 3 and 12, as well as the lanthanides and actinides (the two rows at the bottom), are also included in the main group. In chemistry and atomic physics, the main group is the group of elements (sometimes called the representative elements) whose lightest members are represented by helium, lithium, beryllium, boron, carbon ...
Bioorganometallic chemistry is the study of biologically active molecules that contain carbon directly bonded to metals or metalloids. The importance of main-group and transition-metal centers has long been recognized as important to the function of enzymes and other biomolecules.
In the 1970s, Paolo Chini demonstrated that very large clusters could be prepared from the platinum metals, one example being [Rh 13 (CO) 24 H 3] 2−. This area of cluster chemistry has benefited from single-crystal X-ray diffraction. Structure of Rh 4 (CO) 12, a metal carbonyl cluster. Many metal carbonyl clusters contain ligands aside from CO.
A sulfur-based main group analog of a carbyne complex has been prepared by Seppalt and coworkers. [14] The compound, trifluoro(2,2,2-trifluoroethylidyne)-λ 6 -sulfurane, F 3 C–C≡SF 3 , prepared by dehydrofluorination of F 3 C–CH=SF 4 or F 3 C–CH 2 –SF 5 , is an unstable gas that readily undergoes dimerization to form trans -(CF 3 ...