Transition metals molecular structures

L. Guidoni, P. Maurer, S. Piana, and U. Rothlisberger (2002) Hybrid Car-Parrinello/Molecular Mechanics Modelling of Transition Metal Complexes Structure, Dynamics and Reactivity. Quant. Struct.-Act. Pel. 21, p. 119... 

Veillard, A., Ab Initio Calculations of Transition Metal Organometallics Structure and Molecular Properties, Chem. Rev. 1991, 91, 743 766. 

Ozin, Ozkar, et ai. [226-229] reported a new approach to synthesizing transition metal oxide structures in molecular sieve hosts. [W(CO)6] located within the supercages of NaY zeolite was photochemically dissociated in the presence of O2. This method provides a mild and quantitative synthetic pathway to tungsten(VI) oxide moieties which are encapsulated within the supercages of the zeolite Y (Eq. 4.19). 

Wang L S and Wu H 1998 Probing the electronic structure of transition metal clusters from molecular to bulk-like using photoeieotron spectroscopy Cluster Materials, Advances In Metal and Semiconductor Clusters vo 4, ed M A Duncan (Greenwich JAI Press) p 299... 

Attempts to classify carbides according to structure or bond type meet the same difficulties as were encountered with hydrides (p. 64) and borides (p. 145) and for the same reasons. The general trends in properties of the three groups of compounds are, however, broadly similar, being most polar (ionic) for the electropositive metals, most covalent (molecular) for the electronegative non-metals and somewhat complex (interstitial) for the elements in the centre of the d block. There are also several elements with poorly characterized, unstable, or non-existent carbides, namely the later transition elements (Groups 11 and 12), the platinum metals, and the post transition-metal elements in Group 13. 

C.J. Ballhausen, Molecular Electronic Structures of Transition Metal Complexes, McGraw-Hill, New York, 1979. 

Bray KL (2001) High Pressure Probes of Electronic Structure and Luminescence Properties of Transition Metal and Lanthanide Systems. 213 1 - 94 Bunz UHF (1999) Carbon-Rich Molecular Objects from Multiply Ethynylated rr-Complexes. 201 131-161... 

As holds for other cluster systems, certain magic cluster electron counts exist, which indicates for a certain cluster-halide ratio and interstitial present the filling of all bonding molecular orbitals and therefore the thermodynamically most stable situation. For main group interstitial atoms these are 14 cluster-based electrons whereas for transition-metal interstitials the magic number is 18 [1, 10-12]. All of these phases are synthesized by high-temperature solid-state chemical methods. A remarkable variety of different structure types has been... 

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