B Caproic acid

Bromobenzaldehyde, 17, 20 18, 62 Jl-BttOMOBF.NZALDrACETA.TF, 18, 63 J-Bromobenzoic acid, 17, 21 p-B romobiphenyl, 16, 85 ar-Bromo-iso-caproic acid, 11, 22 a-Bromo-B-caproic acid, 11, 22 Bromocyanogen, 11, 30 /9-Bromoethylamtoe hydrobromide, 18,13, 77... 

CAPROIC ACID or b-CAPROIC ACID (142-62-1) Combustible liquid (flash point 215°F/101°C oc). Violent reaction with oxidizers. Incompatible with sulfuric acid, caustics, ammonia, amines, isocyanates, alkylene oxides, epichlorohydrin. Attacks common metals. 

What is the empirical formula of caproic acid (b) Caproic acid has a molar mass of 116 g/mol. What is its molecular formula ... 

Myristic acid from hexanoic acid and methyl hydrogen sebacate). Dissolve 23 -2 g. of redistilled hexanoic acid (re caproic acid), b.p. 204-6-205-5°/760 mm., and 21-6 g. of methyl hydrogen sebacate in 200 ml. of absolute methanol to which 0 13 g. of sodium has been added. Electrolyse at 2 0 amps., whilst maintaining the temperature between 30° and 40°, until the pH is about 8 0 (ca. 6 hours). Neutralise the contents of the electrolysis cell with a little acetic acid and distil off the methyl alcohol on a water bath. Dissolve the residue in 200 ml. of ether, wash with three 50 ml. portions of saturated sodium bicarbonate solution, once with water, dry with anhydrous magnesium sulphate, and distil with the aid of a fractionating column (see under Methyl hydrogen adipate). Collect the re-decane at 60°/10 mm. (3 0 g.), the methyl myristate at 158-160°/ 10 mm. (12 5g.) and dimethyl hexadecane-1 16-dicarboxylate at 215-230°/ 7 mm. (1 -5 g.)... 

Figure 4.18 A, separation of antihistanine and decongestant drugs by reversed-phase IPC. Mobile phase nethanol-water (1 1) containing 5 aM hexanesulfonate and 1 % acetic acid at a flow rate of 3 al/nin. B, separation and indirect OV detection of carboxylic acids by reversed-phase IPC. Coaponents 1 acetic acid, 2 = propionic acid, 3 butyric acid, 4 = valeric acid, 5 caproic acid, and S -. systea peak. Mobile phase 0.3 aM l-phenethyl-2-picoliniua in acetate buffer at pH 4.6.

Fig. 8.3. GC chromatogram of mixed silage juice standards using a Carbopack B-DA column. Identity and concentrations (before diluting 4 1 standard 0.3 M oxalic acid) a, ethanol, 1 mg mM b, acetic acid, 1.25 mg mM c, propionic acid, 0.25 mg ml" d, isobutyric acid, 0.25 mg mM e, n-butyric acid, 0.25 mg mM f, pivalic acid (internal standard), 0.4 mg mM g, isovaleric acid, 0.25 mg mM h, lactic acid, 10 mg mM i, n-valeric acid, 0.25 mg mM j, isocaproic acid, 0.25 mg mM k, n-caproic acid, 0.25 mg mM.

Problem 16.1 Give a derived and lUPAC name for the following carboxylic acids. Note the common names, (a) CH,(CH,) COOH (caproic acid) (b) (CH,),CCOOH (pivalic acid) (c) (CH,)X HCH,CH,COOH ( y-methylvaleric acid) (d) C H,CH,CH,COOH (/3-phenylpropionic acid) (e) (CH,),C(OH)COOH (a-hydroxyisobutyric acid) (/) H06C(CH,),C00H (succinic acid) (no derived name). ... 

Figure 3.20. Analysis of carboxylic acids and alcohols by reversed phase HPLC, with indirect UV detection, (a) Carboxylic acids. Chromatography conditions mobile phase, 3 X 10 4 M l-phenethyl-2-picolinium in acetate buffer (pH 4.6) column, ju-Bondapak phenyl detection, indirect UV absorbance at 254 nm. Peaks 1, acetic acid 2, propionic acid 3, butyric acid 4, valeric acid 5, caproic acid S, system peak, (b) Aliphatic alcohols. Chromatography conditions mobile phase, 4 x 10 4 M nicotinamide in water column. Ultrasphere ODS detection, indirect UV absorbance at 268 nm. Peaks 1, methanol 2, propylene glycol 3, ethanol 4, 2-propanol 5, 1-propanol 6, system peak 7, 2-butanol 8, 2-methyl-l-propanol 9, 1-butanol. (Redrawn from Refs. 23 and 24 with permission.)...

Fig. 5-54. Separation of some long-chain fatty acids by means of ion suppression technique. - Separator column IonPac NS1 (10 pm) eluent (A) 3 10 5 mol/L HC1 / acetonitrile / methanol (70 24 6 v/v/v), (B) 3 10-5 mol/L HC1 / acetonitrile / methanol (16 60 24 v/v/ v) gradient linear, 100% A in 15 min to 100% B flow rate 1 mL/min detection suppressed conductivity injection volume 50 pL solute concentrations 100 ppm butyric acid (1), 100 ppm caproic acid (2), 200 ppm ca-prylic acid (3), 200 ppm capric acid (4), 300 ppm lauric acid (5), 300 ppm myristic acid (6), and 400 ppm palmitic acid (7).

Tn Instances where the polyurethanes were aged In pure water, very low concentrations of the specific hydrolysis product 6-hydroxy caproic acid were observed in the residue of polymer B... 

---