PtS-related frameworks

Figure 5. [RuCl2(pyz)4], which displays four equatorial pyz molecules with free ex -oriented N-donor atoms in a square-planar orientation, reacts with Ag salts to form 2-D and 3-D bimetallic networks. Metalloporphyrins are widely used metalloligands. They contain metal-ligating functions such as pyridine,carboxylate, " and cyanide " on the periphery. The structural analysis of [Cu Cu(tpyp) ] (tpyp = 5,10,15,20-tetrat4-pyridyl)-21H,23H-porphyrin) represents a PtS-related framework (Figure 6 and Scheme 6q). This framework occupies less than half the volume of the crystal, the remaining space being comprised of highly disordered solvent molecules and anions.

A new type of 3D net is produced by interconnecting 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine paUadium building blocks via Cd centres. A PtS-relat framework can be deliberately constructed by interconnecting square planar Pt(CN)4 building blocks by tetrahedral Cu centres. 

MTW, Pt hydroconversion catalyst MTW-related frameworks Mu-2 by Mu-3 transformation Mu-3 stability... 

Other works related to the use of platinum carbonyl species in the preparation of catalysts, which lie beyond the scope of this chapter, refer to the synthesis in situ of supported platinum carbonylate species. For this purpose, the impregnation or exchanging of Pt precursors as [Pt(NH3)4], [Ptcy and [PtCLt] " on an appropriate support is carried out. Then, the carbonylation renders a carbonylate species that could be naked to metal frameworks by appropriate decarbonylation. 

If one wishes to use eq. (1) to model adsorption of fluids, one refers to the lattice gas interpretation of eq. (1), where 5, = — 1 if a lattice site is filled while Si = +1 if it is empty, pt = (1 - )/2 being the local density. Then again H is related to the chemical potential in the bulk, while H relates to the binding energy to the walls (in the framework of a model where the range... 

Since the manuscript was sent to the Editors a few papers have appeared related to species of the type L2M(/r-S)2ML2. A puckered structure, comparable with that of 25-26, has been determined for a Pt derivative by means of X-ray diffraotion, while a Pd analogue has been characterized by computational methods. A theoretical analysis of the same framework has emphasized the role of the direet M-M interaction for skeletal puekering. Finally a review article highlights the ehemieal reactivity promoted by the Pt2S2 core. ... 

Gable, R. W., Hoskins, B. F. and Robson, R. (1990) "Synthesis and Structure of [NMc4] [CuPt(C34)4] An Infinite Three-dimensional Framework Related to PtS which generates Intersecting Hexagonal Channels of Large Cross Section", J. Chem. Soc., Chem. Commun., 762-763. 

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