Bis- -cyclohexyl

Polyurethane dispersions (PUD s) are usually high-performance adhesives based on crystalline, hydrophobic polyester polyols, such as hexamethylene adipate, and aliphatic diisocyanates, such as methylene bis(cyclohexyl isocyanate) (H12MDI) or isophorone diisocyanate (IPDI). These PUD s are at the more expensive end of the waterborne adhesive market but provide excellent performance. 

A prepolymer is made first by charging Pluracol E2000 [1000.0 g, 1.0 eq., poly(ethylene oxide), 56 OH, BASF] to a suitable container equipped with a mechanical stirrer and a nitrogen gas inlet. Flush the container with dry nitrogen and add Desmodur W (264.0 g, 2.0 eq., 4,4 -methylene-bis(cyclohexyl isocyanate), 31.8% NCO, Bayer). While maintaining a positive N2 pressure on the reaction mixture, stir and heat at 80°C for 2 h. Cool the product to room temperature and check the NCO content (theory = 3.32 %). It might be necessary to warm the highly viscous prepolymer to take samples for titration. To a portion of this prepolymer (250.0 g, 0.2 eq.), add Dabco T-12 (0.25 g, dibutyltin dilaurate,... 

Bis(2-diisopropylaminoethyl) Disulfide Bis(2-diisopropylaminoethyl) Sulfide Bis(2-fluoroethyl) 2-Chloroethylamine Bis(2-fluoroethyl)methylamine Bis(2-hydroxyethyl) Sulfide Bis(2-hydroxyethyl) Thioether Bis(2-hydroxyethyl)amine Bis(2-hydroxyethyl)methylamine Bis(2-propenyl) Sulfide Bis(bromomethyl) Ether Bis(chloromethyl) Ether Bis(cyclohexyl)carbodiimide Bis(ethenyl)sulfone Bis(trichloromethyl) Carbonate Bis(/3-bromoethyl) Sulfide Bis(/3-chloroethyl)ethylamine Bis(/3-Chloroethyl)methylamine Bis(/3-chloroethylthio)ethane Bis(/3-mercaptoethyl) Sulfide... 

Mn(II) ions complexed by porphyrinato(2 ) ligands have shown catalytic superoxide anion dismutation. One SOD mimic, M40403, complexes Mn(II) via a macrocyclic ligand, 1,4,7,10,13-pentaazacyclopentadecane, containing added bis(cyclohexyl) and pyridyl functionalities. M40403 carries the systematic name [manganese(II) dichloro] 4R,9R, 14/s, 19/ )-3,10,13,20,26-pentaazatetracyclo[20.3. 1.0(4,9)0(14,19)]hexacosa-l(26),-22(23),24-triene ]. The molecule is shown in... 

Cahonic iridium complexes bearing imidazol-2-ylidene hgands were applied as TH catalysts by Hillier et al. [48]. Here, [lr(cod)(py)(L)]Pp6 (L= IMes, l,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (53a), IPr, l,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (53b) and ICy, l,3-bis(cyclohexyl)imidazol-2-ylidene (53c) were employed as catalysts for TH from 2-propanol to various unsaturated substrates, and compared to [lr(cod)(py)(PCy3)]PF6 and complexes formed in situ from [Ir(cod)(py)2]PF,5 and diazabutadienes (RN=CHCH=NR, DAB-R R = cyclohexyl, DAB-Cy 2,4,6-trimethylphenyl, DAB-Mes adamantyl, DAB-Ad 2,4,6-trimethoxyphenyl, DAB-trimethoxyphenyl). AH complexes were achve catalysts for the TH of acyclic ketones, with complex 53c being the most achve, showing 100% conversion of BuC(0)Me and PhC(0)Ph in 25 and lOmin, respechvely, using 0.025 mol% of catalyst and KOH in PrOH at reflux (Scheme 4.20). 

Ether Bis-[cyclohexyl-difl uoro-methyl]- ElOa. 349f. 

Sulfane Bis>-[cyclohexyl-lrifluoro-mcthyl-amino]- ElOa. 258 (RN = CS + IF5)... 

To evaluate the influence of the organic R group of the RS-thioether function and to allow a comparison with ArS(CH2)4SAr (see above), Cul was reacted with 1,4 bis(cyclohexyl)butane CyS(CH2)4SCy. The colorless crystals obtained by reaction in a 1 1 metal to ligand ratio were found to be of composition... 

Here again the scheme applies only for cis-diazenes. However, as already mentioned, trans bis(cyclohexyl)diazene yields the corresponding (trans-diazene) Cr(CO)5 complex by reaction with CrfCO)sTHF45). Another interesting complex containing two different metals bound to one N=N group (VIII, M = M1, M = Cr, M = Mo) was prepared from bis(diazanorbornene)Cr(CO)4 and (nor-C Hg )Mo(CO)4 by Acker-mann and Kou41 . 

K. Issleib u. H. Weichmann, Chem. Ber. 101, 2197 (1968) l,2-Bis-[cyclohexyl-hydroxy-phosphonyl]-ethan... 

These principles were used to assign Cls, Ols and Nls NEXAFS spectra of polymers important to the microelectronics industry. Interpretation of polyamic acid and polyimide spectra were aided by assigning the spectra of simpler polymers and monomers. The compounds studied in the form of spun films were poly(vinyl methyl ketone) (PVMK), poly(dimethyl phenylene oxide) (PMPO), poly(pyromellitimido 4,4-methylene bis-cyclohexyl amine) (PMDA-MBCA PI), and poly(pyromellitimido oxydianiline) (PMDA-ODA PI) and in the form of MBE-deposited films were poly(amic acid) (PAA), and PMDA-ODA PI. Changes in the NEXAFS spectra as a function of evaporated Cr overlayer thickness were measured for PVMK, PMPO and PMDA-ODA PI. Evolution of the NEXAFS spectra as a function of deposited organic film thickness and thermal treatment were measured for PAA on Cu and Cr substrates. 

PMPO represents the ODA part of PMDA-ODA PI and has four it resonances at 285.5, 287.2, 289.2 and 290.6 eV. These result from transitions from Cls core level states of two different energies (carbon bonded to C and H, and carbon bonded to C and O or C and N) to the two lowest it MO s for the arene ring it system. PVMK contains a carbonyl group and has an intense, sharp carbon NEXAFS peak at 286.7 eV attributable to a C = O it resonance, and a smaller peak at 288.7 eV from the C-H resonance. Poly(pyromellitimido 4,4 -methylene bis-cyclohexyl amine) (PMDA-MBCA PI) represents the PMDA part of PMDA-ODA PI without the added complication of any other it systems. As in the previously discussed case of propiolic acid, the arene and carbonyl it MO s on this polymer are in close enough proximity to interact and shift in energy. Thus, the arene it reso-... 

Wu [5] prepared co-urea polyisoprene copolymers consisting of polyisopre-nediamines with 4-methylene-bis(cyclohexyl isocyanate). 

BIS(CYCLOHEXYL ISOCYANIDE)GOLD(I) f, 2-BIS(DIPHENYLPHOSPHINO)FERROCENYL]ETHYLAMINE 115... 

Solubility sol dichloromethane, 1,2-dichloroethane, and diethylene glycol dimethyl ether insol diethyl ether and pentane. Preparative Methods the complex is prepared in situ by the reaction of bis(cyclohexyl isocyanide)gold(I) tetrafluoroborate with (R)-N-[2-(N,N-Dimethylamino)ethyl]-N-methyl-l-[(S)-I, 2-bis (diphenylphosphino)ferrocenylJethylamine, typically in dichloromethane. ... 

The gold(I) complex is prepared in situ by the reaction of (1) with bis(cyclohexyl isocyanide)gold(I) tetrafluoroborate (2), typically in anhydrous dichloromethane. The dihydrooxazolines obtained provide a ready access to enantiomerically pure p-hydroxy-a-amino acid derivatives. High diastereo- and enantios-electivity are generally maintained with a wide variety of substituted aldehydes, and a-isocyanoacetate esters. N,N-Dimethyl-a-isocyanoacetamides and a-keto esters have been substituted for the a-isocyanoacetate ester and aldehyde component, respectively, sometimes with improved stereoselectivity. The effect of both the central and planar chirality of (1) on the diastereo- and enantioselectivity of the gold(I)-catalyzed aldol reaction has been studied. The modification of the terminal di-alkylamino group of (1) can lead to improvements in the stereos-... 

Bis(cyclohexyl isocyanide)gold(I) Tetrafluoroborate-(/J)-A/-[2-(A/, N-Dimethylamino)ethyl]-N-methyl- 1-(S)-1, 2-bis(diphenylphosphino)ferrocenyl]ethylamine, 115 C41H50O4... 

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