Dinuclear substituents

As can be seen from Table 1, a whole set of compounds is available from the reaction of Eq. (5), which shows the high variability of both the substituents at silicon and the introduced metal. This method is only limited by the steric demand of the substituents. If the residues at the silicon are too bulky, no reaction according to Eq. (5) occurs. The method also allows the use of dinuclear carbonylate anions... 

Pyridine derivatives with additional donor functions and sterically demanding substituents have been used with the intention of producing complexes of Cd (and of other metals) with low coordination number one of these ligands is the tridentate, planar-bonding 2,6-bis[(2,6-dimethyl-phenylimino)methyl] pyridine (pydim a Schiff base derived from 2,6-pyridine dialdehyde), which with Cd(BF4)2 and thiocyanate gives a dinuclear complex [(pydim)Cd(/x-NCS-S,N)]2(BF4)2 with N-dominated coordination sphere.191 As centrosymmetric Plijc, Z= 2), the complex has an antiparallel /x-1,3 NCS double bridge with Cd—N and Cd—S bonds (224.6 pm and 255.5 pm, respectively) the Cd—N(py) bond is clearly shorter than the Cd—N(imino) bonds (225.6 pm and 245.0 pm,... 

Qi, Y. Desjardins, P. Wang, Z. Y. Novel near-infrared active dinuclear ruthenium complex materials effects of substituents on optical attenuation. J. Opt. A Pure Appl. Optics 2002, 4, S273-S277. 

It is well-established that the molecular and electronic structures of metal complexes of azamacrocycles are greatly affected upon N-alkylation (197). This is mainly due to two factors (a) the decrease of the ligand field strength and (b) the increase in the steric requirements upon going from a secondary to a tertiary amine donor function (251). To examine whether the properties of the dinuclear amine-thiophenolate complexes are affected by the N-alkyl substituents, analogous complexes of the... 

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