The Concepts of Back-Bonding and Inorganic Symbiosis

By far the best crystallographic evidence for simultaneous back-bonding is the platinum(II) complex of ethylene [ethene] PtCl3(C2HJ prepared by Zeise. The C—C 

The question of back-bonding has many ramifications. Colourless 3d Cr(CO) can be photolyzed at low temperature in vitreous matrices to coloured, apparent cases of iV = 5. However, the band maximum (in nm) depends on the matrix Ne(624), SFg(560), CF (547), Ar(533), Kr(518), Xe(492) and CH (489). These results show clearly that at most one (neon) has no chemical influence, but it seems established that three noble gases form NgCr(CO)5 since a mixed matrix Neo.98Xeo.02 shows two 

The catenation of S—S—S. .. is much more mobile than aliphatic carbon links, but give rise to bidentate ligands such as Sf S4 and 85 . In view of the notorious 

Epiotis discusses the question why CF and CH are 1.1 eV more stable than two 

The gaseous molecules LijO, Li O and LijO may represent another type of symbiosis, like possibly the preparation of 1,2-dilithiobenzene in unreactive solvents from 1,2-CgH Br2 and four moles of metallic lithium. The five Alkali metals are quite individualistic sodium(—I) being as large as iodide, and Rb both being ns  

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