1,10-Phenanthroline adducts

Table 4.1.6 Cardiovascular activity data of organotin(IV) derivatives of umbelliferone and their 1,10-phenanthroline adducts...

The hydrated 1,10-phenanthroline adduct of triphenyl tin chlorodifluoroacetate, Ph3Sn(00CCClF2) phen-H20, is a dimeric supermolecule formed by hydrogenbonding between coordinated water and phenanthroline [62]. 

Powder EPR spectra for Mnu-doped compounds (M(acac)2(bipy)] (M = Zn or Cd), [Zn(acac)2(phen)] and [Cd(acac)2(phen)H20)]7<47 indicate that distortions from octahedral symmetry were greater for the bipyridine adduct than for the phenanthroline adduct, and greater for Cd than for Zn. IR measurements confirm that all the compounds are tris-bidentate, except for [Cd(acac)2(phen)(H20)] which probably has coordinated water and a free carbonyl group. 

One complex, a phenanthroline adduct, [Fe([14]dieneN4)phen](C104)2 does not fit into this scheme in that it shows S = 2 = = S = 0 spin equilibrium at room temperature The magnetic moment as a function of temperature between 80 K and 350 K is reproduced in Fig. 40. A plot of log K vs. 1/T, where the equilibrium constant is calculated in terms of the relative concentrations of the HS and the LS isomers, as... 

Oriented growth of lanthanide oxide thin films of Sm, Eu, Gd, Er and Yb on different substrates is possible by the low-pressure MOCVD technology from the corresponding phenanthroline adducts of rare earth metal enolates Ln(acac)3(phen) as described by Shiv-ashankar and coworkers (Table As expected, the films grown at lower... 

While 2,2 -bipyridine or phenanthroline adducts are likely to contain an approximately planar, five-membered -M-N-C-C-N moiety, upon coordination of a RR 2C(pz)2 a six-membered cycle is formed for which a boat conformation is predicted. Nevertheless, both the internal and external angles of the formally related M-(N-N)2-E moieties (where E is not carbon), are known to be able to undergo wide variations. Indeed, X-ray studies carried out on several / ,-pyrazolato-/V,/V -derivatives showed that the six-membered ring is not always in the boat conformation. This may undergo a severe folding as in bis(3,5-dimethylpyrazolyl)borato-7V,/V ](//3-cyclohepLatrienyl) (dicarbonyl)molybdenum,195 or may even approximate a chair, or at least, a distorted chair as in dimeric bis(cyclopentadienyltitanium)(//-pyrazolato-/V,7V ) (Scheme 10a).196... 

Figure 13.4 Energy profile for the dimerization reaction observed with phenanthroline adducts. The calculations were performed with Cp instead of Cp ligands...

They form adducts with Lewis bases in which the phenanthroline is monodentate, PtX2(dimphen)L (L = Me2S, Me2SO, PhNO) [87], c/s-Pt(bipy)Cl2 exists in yellow and red forms, the difference in colour results from different stacking modes in the solid state, with respective Pt-Pt distances of 4.435 and 3.45 A [88]. 

They form adducts with Lewis bases in which the phenanthroline is monodentate, PtX2(dimphen)L (L = Me2S, Me2SO, PhNO) [87],... 

Metal dithiophosphinates focused recent interest due to their potential use as single source precursors for low-pressure, metal-organic chemical vapor deposition (LP-MOCVD) of metal sulfides. Thus, zinc and cadmium dithiophosphinates and their phenanthroline and bipyridine adducts were characterized and used for deposition of ZnS and CdS.85,86... 

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