Manganese coordination polymers

Aza analogs of cyclopentadienylmanganese tricarbonyl have also been prepared.158 160,162 Application of this sequence to pyrazole, imidazole, and 1,2,4-triazole, however, led not to aza analogs but to coordination polymers.168 A mixed manganese and chromium carbonyl complex of 2-benzylpyrrole has been prepared.163a... 

Fig. 2 The 1 -D coordination polymer octaethylporphyrinato-manganesefin) tetracyanoethenide (ethyl groups omitted for clarity). The two tetracyanoethenide anions are not crystallographically equivalent, but slightly tilted with respect to each other. Pink spheres denote manganese, blue nitrogen, and gray carbon.

Hetero-bimetallic coordination polymers of copper(II) and manganese(II) bridged by pyridinedicarboxylate ligands were syn esized and characterized by single-crystal XRD and thermal analysis to study the effect of thermal dehydration on the magnetic properties of these systems [145]. 

The chromium(III) complex [Cr(bipy)(ox)2] can act as a metaUoligand to form a coordination polymer chain with Mn(II) ions, in which each manganese ion is 8-coordinate... 

The catecholate functionality of CTC should make it a more effective metal binder than is CTV, although there are few known examples. A discrete trinuclear chelate complex of deprotonated CTC with Pt(II) has been reported. The manganese hydroxide-linked MeLa tetrahedra of the type discussed in Section 4.1.2 link into a complicated 3D coordination polymer through bridging oxides and sandwich-type interactions to additional Cs + cations that occur between (MnOH)6L4 tetrahedra. ... 

A [Cu Co Ni ] coordination polymer, [ LCu(CH30H)(H20)Mn Ni(CN)4 ] (H20)(CH3CN), which consists of linear zigzag chains constructed from LCuMn nodes connected by [Ni(CN)4] spacers (Fig. 18) has been obtained. The [Ni(CN)4] ions interact only with the manganese(II) ions from two nodes through two trans CN groups. 

N anomaterials have been around for hundreds of years and are typically defined as particles of size ranging from 1 to 100 nm in at least one dimension. The inorganic nanomaterial catalysts discussed here are manganese oxides and titanium dioxide. Outside the scope of this chapter are polymers, pillared clays, coordination compounds, and inorganic-organic hybrid materials such as metal-organic frameworks. 

In other examples, compounds in which a metal atom is already coordinated in a molecule can be used as a comonomer in an addition polymerization. Two examples involve the ferrocenes discussed in Chapter 6. The vinyl ferrocene molecule is shown in 7.14, and a similar vinyl manganese complex in 7.15.30 An alternative approach involves condensation polymerization. For example, if the R group in the ferrocene unit shown in 7.16 contains a hydroxyl group, it can be copolymerized with a diacid chloride. If it is an acid chloride, it can be copolymerized with a diamine. (This type of polymer is called a heteroannular chain if only one of the rings in the repeat unit is in the backbone, the polymer is called homoannular.)7 Similarly, the titanium complex shown in 7.17 is copolymerized with diacids or diols.30 Numerous other examples involving ferrocenes are discussed in Chapter 6. 

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