Solvation dichloromethane

Crespo, O., Gimeno, M.C., Laguna, A. and Villacampa, M.D. (1998) p-[7,8-Bis (diphenylphosphino)-7,8-dicarba-nido-undecaborato-lkP, 2kP ] (pentafluorophenyl-lkC) (triphenylphosphine-2kP)digold(l) dichloromethane solvate. Acta Crystallographica, Section C Crystal Structure Communications, C54(2), 203-205. 

Jones, P.G., Terroba, R., Fernandez, E. and Laguna, M. (2002) Tris (pentafluorophenyl) [2-(diphenylphosphino)thiophenol-kPjgold (III) dichloromethane solvate. Acta Crystallographica, Section E Structure Reports Online, E58(3), m90-m92... 

SORPUK Tris(2,4,6-trimethoxyphenyl)(diiodine)phosphine dichloromethane solvate 2.483 3.340 174.50 I... 

Dimerization of the dimethylformamide-solvated sodium cyanodithioformate takes place in carbon tetrachloride and dichloromethane with elimination of sulfur1,18 but at a much lower rate than in water. 

Iron(III) compounds of 3-OEt-salAPA have been widely studied [127, 128, 139-145]. Both the anion and the incorporated solvent molecule influence the spin crossover behaviour of the complex salts. Thus T1/2 for [Fe(3-OEt-salAPA)2]ClC>4 is 295 K, whereas that for the dichloromethane solvate is 152 K [140]. The transition in [Fe(3-0Et-salAPA)2]C104 and [Fe(3-OEt-salA-PA)2]BPh4 is more gradual and occurs at a somewhat higher temperature than that for the benzene solvate [Fe(3-0Et-salAPA)2]C104-C6H6 [141]. 

Complex C (Scheme 21) seems to shows stable penta-coordination for apparently very different reasons. The compound is cationic, but the counterion is a non-coordinating tetraarylborate. Interestingly, neither the dichloromethane solvent nor the diethylether present in the reaction mixture seem to coordinate to the open site in solution. The compound was crystallized from a tetrahydrofuran/pentane mixture as the tetrahy-drofuran (THF) solvate, but in the crystal structure, the THF is remote from the open site at platinum. The open site is shielded somewhat by the methyl groups of the protonated TpMe2 ligand, but it does not appear completely inaccessible. A reasonable explanation for the... 

In the course of our polarographic studies on organic cations we determined the half-wave potentials, 1/2, for various arylmethylium ions [1-11]. The aim of the present work is to extract from these values some new information concerning the relative magnitude of their solvation enthalpies in three very different solvents. A comparison of our results [obtained in methanesulphonic acid (MSA) and dichloromethane (DCM)] with those of Volz and Lotsch [12] [obtained in cyanomethane (CM) solutions] yields some useful conclusions. 

The Lewis acid-base reaction leading to complex formation910 has been recently11 considered in relation to the role of solvation effects. Many scales of thermodynamic parameters have been suggested. The concept of donor number (DN) was proposed by Gutmann12, and defined as the AH (kcalmol-1) for the interaction of a basic solvent with SbCL in 1,2-dichloromethane at room temperature ... 

A comparison of the synthesis of Z-Phe-Leu-NH2 in ten different solvents revealed that the highest overall yields could be expected in solvents where the substrate solubility is minimized. The highest yields in terms of solid product were found in solvents where both substrate and product solubility are minimized [45]. These simple rules may not hold when special factors apply, such as the formation of solid solvates. This may account for a few apparent exceptions, such as the product precipitation in dichloromethane of both a peptide and a sugar fatty acid ester [45, 63]. 

This, however, can be an oversimplification if the reaction conditions (solvent, temperature eta) are such that the propagating ion pair is either partially dissociated or more highly aggregated. Usually the reaction medium is a moderately polar solvent, e.g. dichloromethane or 1,2-dichloro-ethane, and the concentrations of active centres employed are sufficiently small to discount contributions from more highly aggregated species. The problem, therefore, with few exceptions revolves around a fairly simple equilibrium involving only ion pairs and free solvated ions, each with its own reactivity, e.g. 

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