Nitrogen metal-bound

Heteroatom compounds chemical compounds that contain nitrogen and/or oxygen and/or sulfur and/or metals bound within their molecular structure(s). 

This section deals with alkylidene complexes L M=CR2 and vinylidene complexes LnM=(C)n,=CR2 in which the metal-bound carbon atom bears only hydrogen, alkyl, or aryl groups, but neither heteroatoms (halogen, nitrogen, oxygen, or sulfur) nor electron-withdrawing groups. Dimetallacyclopropanes and ketene complexes will not be discussed. 

A rare case of the formation of the first metal-bound stannatrane complex 187 has been reported as the result of the reaction between triethanolamine and organometallic compound 186 (Equation 11) <1999CC837>. As confirmed by a X-ray single crystal diffraction study, the Sn-N distance is significantly shorter compared to the sum of the tin(iv) and nitrogen van der Waals radii. 

As an example of the first kind of outer-sphere complex formation, Werner (44) studied the interaction of thiocyanato complexes of cobalt (Ill)ammines with silver ions. In these complexes nitrogen is bound to the metal, and the sulfur atom in the thiocyanate group is free to complex... 

In N-substituted derivatives, the nature of the electronic environment of the pyrrole-type nitrogen is different from that of its pyridine-type counterpart. Each of these pyrrole-type nitrogens is bound covalently to three neighboring atoms, and supplies two electrons to the delocalized 7r-bond system. In this case, the component, which is oriented radially with the bond N-R (R = H, alkyl, metal), is dominated by a o n-c- transition. The 22 component, which is dominated by a aN R--7r transition, is approximately tangential to the aromatic ring. In other words, the tangential component ( t) is dominated by an h-tt (lone-pair) transition for a pyridine-type nitrogen. 

The osmiamate ion, [Os03N] , was the first example to be prepared of complex ions in which nitrogen is bound to a transition metal by a multiple bond. 

The metal ion complexes with an oxygen and a nitrogen of the reactant, as well as with a molecule of water. The metal ion increases the rate of the reaction by positioning the water molecule and increasing its nucleophilicity by converting it to metal-bound hydroxide. 

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