Mono bonding parameters

Fig. 9. Volume-dependent cohesion parameter (S ) versus Hansen hydrogen-bonding parameter for polylactide and alcohol. Values indicated for solvents with AS <5 MPa (3CP, 3-chloropropanol BEA, benzyl alcohol CHL, cyclohexanol IPL, 1-pentanol 2EB, 2-ethyl-1-butanol DAL, diacetone alcohol DBU, 1,3-dimethyl-l-butanol ELA, ethyl lactate BLA, n-butyl lactate EME, ethylene glycol monoethyl ether DGM, diethylene glycol monoethyl ethermethyl DGE, diethylene glycol monoethyl ether EGB, ethylene glycol mono-n-butyl ether 2EH, 2-ethyl-1-hexanol lOL, 1-octanol 20L, 2-octanol DGN, diethylene glycol mono n-butyl ether IDE, 1-decanol TDA, l-tridecanol NON, nonyl OA9, oleyl alcohol).

There have a number of computational studies of hypothetical RMMR species [10-13, 40, 411. The simplest compounds are the hydrides HMMH. Some calculated structural parameters and energies of the linear and trans-bent metal-metal bonded forms of the hydrides are given in Table 1. It can be seen that in each case the frans-bent structure is lower in energy than the linear configuration. However, these structures represent stationary points on the potential energy surface, and are not the most stable forms. There also exist mono-bridged, vinylidene or doubly bridged isomers as shown in Fig. 2... 

Although the spectroscopic parameters prove to be diagnostic for simple finger-print identification of the corresponding species, more attentive analysis of the data contained in Tables 2.7 and 2.8 indicate that there is no correlation between the pNO values and the M—N—O bond angles, for both the mono- and the dinitrosyl complexes. It is then incorrect to attempt assignments of the MNO geometries based on the observed N—O... 

An EPR study of the monomeric 02 adducts of the Schiff base complexes of Co(bzacen)(py) (71a) and the thiobenzoyl analog Co(Sbzacen)(py) (71b) characterized the five-coordinate mono (pyridine) precursors and the six-coordinate 02 adducts.327 Increased covalency in the Co—S bonds was seen in the EPR parameters, indicative of 7r-backbonding. Substituent effects on the aromatic rings had no effect on the EPR spectra, but these were reflected in the observed redox potentials. Furthermore, the S-donors stabilize the Co ion in lower oxidation states, which was consistent with destabilization of the 02 adducts. 

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