Hexane diamine

The name ethylene should be used only for the divalent group -CH2-CH2- , and not for the monomer CH2=CH2 the name for the latter is ethene. hexane-1,6-diamine. 

A polyamide derived from adipic acid and a mixture of hexane-1,6-diamine and butane-1,4-diamine ... 

Fig.4.51. Separation of the fluorescamine derivatives of several diamines. Peaks 1 - putrescine 2 = cadaverine 3 = hexane-1,6-diamine 4 = heptane-1,7-diamine 5 = octane-1,8-diamine.

The interaction between perfluoro-2-methylpent-2-ene and ethylenedia-mine in the presence of triethylamine forms 5,9-bis(pentafluoroethyl)-6,8,8-tris(trifhioromethyl)-9-fluoro-1,4-diazabicyclo[5.2.0]nona-4,6-diene 148. With hexane-1,6-diamine, the product is 1 l-(pentafluoroethyl)-10-trifhioro-methyl-1,8-diazabicyclo[7.2.0]undeca-8,10-diene 149 (99IZY1578). The structure of 148 was confirmed by X-ray analysis (Fig. 7) (99IZV1578). 

Nylon is the common name for polyamides. Polyamides are generally made from reactions of diacids with diamines. The most common polyamide is called nylon 6,6 because it is made by reaction of a six-carbon diacid (adipic acid) with a six-carbon diamine. The six-carbon diamine, systematically named hexane-1,6-diamine, is commonly called hexamethylene diamine. When adipic acid is mixed with hexamethylene diamine, a proton-transfer reaction gives a white solid called nylon salt. When nylon salt is heated to 250 °C, water is driven off as a gas, and molten nylon results. Molten nylon is cast into a solid shape or extruded through a spinneret to produce a fiber. 

You may have carried out the nylon rope trick in a practical class. The diacid chloride of adipic acid is dissolved in a layer of a heavy organic solvent such as CCI4 and a layer of aqueous hexane-1,6-diamine is carefully placed on top. With a pair of tweezers you can pick up the film of polymer that forms at the interface and draw it out to form a fibre. The reaction is a simple amide formation. 

Figure 7. Comparison of observed XRD patterns of ZSM-5 synthesized with different directing agents. [TPA- tetra-propylammonium bromide, PIPZ- piperazine, HXDM- hexane-1, 6-diamine, HXDL- hexane-1,6-diol, and Na- organic free.] (Reproduced with permission from ref. 17. Copyright 1986 Butterworth.)...

Approximately 3 g of hexane-1,6-diamine is dissolved in aqueous sodium hydroxide (0.5 M, 50 mL) and placed in a beaker (100 mL). A solution of adipoyl chloride (care lachrymator) in hexane (1 g in 50 mL) is added to thi.s beaker and two layers will be seen. At the interface between the aqueous and the non-aqueou.s phase, a thin film will form. Thi.s film can be pulled using a pair of tweezer. to form a long strand of Nylon 6,6. 

Dodecanedioic acid, compd. with 1,6-hexanediamine (1 1). Dodecanedioic acid, compound with hexane-1,6-diamine (1 1) EINECS 236-143-2 Nylon 6-12 salt. 

FIGURE 9.8 Total ion chromatogram of HFBA derivative of hexane-1,6,diamine (115 ng/ml). (Reproduced with permission from Rosenberg, C. and Savolainen, H. Analyst, 3, 1069-1071, 1986. Copyright 1986, Royal Chemical Society.)... 

Hexane-1,6-diamine, a starting material needed for making nylon, can be made from buta-l,3-diene. How would you accomplish this synthesis ... 

The best-known step-growth polymers are the polyamides, or nylons, first prepared by heating a diamine with a diacid. For example, nylon 66 is prepared by reaction of adipic acid (hexanedioic acid) with hexamethylene-diamine (hexane-1,6-diamine) at 280 °C. The designation 66 tells the number of carbon atoms in the diamine (the first 6) and the diacid (the second 6). 

The reaction is often carried out in the presence of carboxylic adds and/or primary amines (e.g., acetic acid and hexane-1,6-diamine), which ad as chain length regulators. Consequently, the concentration of functional end groups is modified. 

Volokhina et studied the SSP kinetics for three aliphatic co-amino adds, 7-aminoheptanoic (enanthoic), 9-aminononanoic (pelargonic) and 11-aminoundecanoic and three hexane-1,6-diamine (hexamethylenediamine) (HMD) salts of adipic, 5,5 -sulfanediylbis(pentanoic add) (5,5 -thiodi (pentanoic add)), and terephthalic add at various... 

Figure 8.1 Selective primary modification of carboxyl group on HA. AEMA 2-aminoethyl methacrylate hydrochloride ADH adipic acid dihydrazide APMA 2-aminoethyl methacrylate CDH carbodihydrazide HDMA hexane-1,6-diamine PDPH pyridyldithioethylamine SH thiol and VS vinyl sulfonyl...

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