Conditions reporting

Are all substandard or hazardous conditions reported m writing and acted upon immediately ... 

General Conditions for each step and selectivity of m-substituted anilines As previously mentioned, Hauser and Reynolds reported on factors governing the first step of the Conrad-Limpach reaction but they tvere by no means exhaustive. Other than the conditions reported above for the first step, HClAleOH, CHCI3 or CHCI2 (neat or with acid catalyst), PhMe or PhH with removal of water with or without acid catalyst, or EtOH/AcOH/CaS04 were reported to provide the desired enamino-ester from an aryl amine and 3-keto-ester. Hauser and Reynolds also noted that o-nitroaniline and o-nitro-p-methoxyaniline failed to form the desired enamino-ester under conditions which they reported. 

Peters, R.D. Diamond, H. "Actinide Leaching from Waste Glass Air-Equilibrated versus Deaerated Conditions", Report PNL-3971, Battelle Pacific Northwest Laboratory, 1981. 

The purpose of this final chapter is to provide the analyst with a background of practical examples to aid in the selection of, firstly, the best chromatographic method and, secondly, the best phase system when faced with an hitherto unknown sample for analysis. The literature is rich with LC applications and frequently publications are available for the separation of closely similar mixtures to that of the sample. It is unlikely, however, that the chromatographic conditions for the actual separation required will be available and, even if they are, the conditions reported may well not be optimum. This is more likely to be true for those applications that are described in earlier publications. Nevertheless, conditions that have be successfully employed for related separations may certainly help to identify those conditions necessary for the sample supplied for assay. 

Estimation of adiabatic increase in the liquid temperature in circular micro-tubes with diameter ranging from 15 to 150 pm, under the experimental conditions reported by Judy et al. (2002), are presented in Table 3.7. The calculations were carried out for water, isopropanol and methanol flows, respectively, at initial temperature Tin = 298 K and v = 8.7 x 10" m /s, 2.5 x 10 m /s, 1.63 x 10 m /s, and Cp = 4,178 J/kgK, 2,606J/kgK, 2,531 J/kgK, respectively. The lower and higher values of AT/Tm correspond to limiting values of micro-channel length and Reynolds numbers. Table 3.7 shows adiabatic heating of liquid in micro-tubes can reach ten degrees the increase in mean fluid temperature (Tin -F Tout)/2 is about 9 °C, 121 °C, 38 °C for the water d = 20 pm), isopropanol d = 20 pm) and methanol d = 30 pm) flows, respectively. 

A thermally 1,5 Tf-shift induced by heating 1-ethoxy alkynes 60 to about 150°C led to ketenes 61. Subsequent cyclizations to give lactams 62 were achieved by attaching a M-benzamido function at C-6 or C-7 of a linear alkyl chain. Azepanones 62 (n = 1) and Azecanones 62 (n = 2) were generated in 68% and 58% yield, respectively. The formation of larger rings (n = 5,9) failed under the conditions reported (Scheme 12) [20]. 

There are only a few examples of low-temperature conditions reported to lead to a species behaving as an o-QM. All of these, except for our O-acyl transfer methods that will be discussed later, use a fluoride ion to trigger the formation of the o-QM in an almost instantaneous manner. In these examples, a high concentration of the intended nucleophile is necessary to prevent any side reactions with the o-QM, because given the low-temperature conditions its formation is usually irreversible. 

Note 1 Average conditions are reported as the left number. Maximum condition reported as the right number. 198... 

Flow Tests. One foot long sand packs using Wilmington oil field unconsolidated sand were prepared for each of the flow tests. Porosity and permeability of all the sand packs were within 30-35% and 100-300 md, respectively. All core packs were evacuated to about 1 mm of mercury (Hg) before saturating them under gravity to assure complete water saturation. Table III gives the core and fluid properties for the flow tests. The properties of the cores were chosen so that they are close to the field conditions reported by Krebs(15). 

Biological degradation of different PBDE compounds in aerobic conditions reported the formation of hydroxylated PBDEs of lower bromination than the original pollutant [26-28, 30]. There is only one report about PBDEs degradation... 

Sundrum A and Acosta Aragon Y (2005), Nutritional strategies to improve the sensory quality and food safety of pork while improving production efficiency within organic framework conditions , Report of the EU-project, Improving Quality and Safety and Reduction of Costs in the European Organic and Low Input Supply Chains, no. CT-2003 506358. 

Neomycin is a readily ionisable molecule and should thus be separable from other antibiotics by application of an electric field (zone electrophoresis). Various workers have successfully applied this technique to neomycin and Table 10 summarises the conditions reported in the literature. A number of authors described the qualitative separation of neomycin from other chemical-types of antibiotics using paper-electro-phoresis181,185,187 while Ochabl89 described systems specifically designed to separate compounds within the aminoglycoside group of antibiotics. 

Enantioselectivities in the asymmetric reduction under phase transfer catalyzed conditions reported till now are still moderate, and should be improved further in future. 

The properties ofPNT-N and PNT-F were measured on films deposited under the conditions reported in Table 18.6. The films, generated by vapor deposition on hot surfaces such as glass or silicon substrates as previously described, are not soluble in common laboratory solvents. The best film was obtained in the absence of oxygen. Film that was deposited in an oxygen-rich ambient exhibited lower thermal stability and poor adhesion. 

No definite statement regarding the temperature or duration of reaction may be made. It seems probable, however, that, as is the case with most relatively new reactions, the conditions reported are in general much more rigorous than is necessary. 

We have shown [1, 2] that, in the polymerisation of styrene by perchloric acid under the conditions reported here, the initiation reaction does not produce carbonium ions and that the monomer is polymerised by non-ionic chain carriers. Since the most likely nonionic reaction product formed from perchloric acid and styrene is the ester 1-phenylethyl perchlorate we attempted its preparation in order to try it as catalyst for the polymerisation of styrene. However, we found this ester to be unstable in methylene dichloride solution. It forms styrene oligomers, polystyryl ions, and perchloric acid, and the preparative technique and the mechanism of the reactions involved will be discussed in a paper dealing with the spectroscopic behaviour of polymerising and polymerised systems. 

It has also been reported that the precursor Pd(AcO)2/dppp in combination with HCOOH, though having relatively high piCa = 3.75, becomes an efficient catalytic system provided the acid is used in relatively large excess (ca. 7500 g polymer/g Pd/h, HCOOH/Pd = 3000/1, under the conditions reported above) [48]. 

McKelvey etal. (1959) investigated the reaction of epoxides with cellulose in alkaline conditions, reporting that alkaline cellulose reacted readily once the concentration of sodium hydroxide was sufficiently high. However, no evidence was found of reaction between cotton yarn and cellulose with a range of epoxides under a variety of reaction conditions. It was concluded that the apparent reactivity of cellulose with epoxides was primarily due to alkaline swelling of the cellulose, self-polymerization of the epoxide monomers then occurring within the interior structure of the fibres. It was also noted that the reactivity with phenol OH groups was very low (e.g. only 1 % conversion of ethylene oxide with various phenols). 

Related reactions, catalyzed by tetra-n-butylammonium fluoride (TBAF), have been reported (74). Under the influence of 5 to 10 mol % of TBAF (THF, -78°C), enolsilane 75 afforded the erythro and threo adducts 76E and 76T whose ratios were time dependent (5 min, E T =1 2 10.5 hr, E T =1 3) (74). The reaction of enolsilane 77 at various temperatures has also been reported (2). At -78 C (1 hr) complete kinetic erythro diastereoselection was observed under the conditions reported by Noyori (74), but at higher temperatures product equilibration was noted (2). It is significant that the kinetic aldol condensation of this tetraalkylammonium enolate exhibits complete erythro selection as noted for the analogous lithium derivative. 

The formation of sulphur on chalcopyrite surface would be expected to occur at 0.15 V at pH = 6 by assuming [Fe ] = 10" mol/L according to reaction (2-8), 0.08 V at pH = 8 and -0.1 V at pH = 11 according to reaction (2-9). While flotation does begin very near these potential for the experimental conditions reported by some authors as shown in Table 2.1. 

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