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Öğe Öğe ADDITION OF POLYETHYLENEGLYCOLS TO ASYMMETRICAL EPOXIDES(Springer Verlag, 1983) ERK, C[Abstract Not Available]Öğe THE C-13 DIPOLE-DIPOLE RELAXATION AND PSEUDOROTATION OF CYCLODODECANONE(Marcel Dekker Inc, 1985) ERK, C[Abstract Not Available]Öğe THE C-13 DIPOLE-DIPOLE RELAXATION AND PSEUDOROTATION OF SOME MACROCYCLIC ETHERS AND A POLYOXALACTONE(Soc Applied Spectroscopy, 1986) ERK, C[Abstract Not Available]Öğe THE C-13 DIPOLE-DIPOLE RELAXATION-TIME OF 1,4,7,10-TETRAOXACYCLODODECANE AND ITS NA+,MG-2+, AND CA-2+ COMPLEXES(Williams & Wilkins, 1984) ERK, C[Abstract Not Available]Öğe THE COMPLEXATION OF 18-CROWN-6 WITH NACL IN DIOXANE WATER AND DETERMINATION OF EQUILIBRIUM-CONSTANTS WITH ION-SELECTIVE ELECTRODES(Elsevier Science Bv, 1991) CAKIR, U; ERK, CThe complexation of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) with Na+ ions in dioxane-water was investigated with a sodium ion selective electrode and a glass electrode, and values of K(e) (equilibrium constant) were determined according to the analytical expression 1/K(e) [L0]n+m-1 = (1 - nP')n (1 - mP')m/P'. The [L0] is the concentration of a ligand L which is kept identical with the cation concentration, and P' = 1/[1 + P(1 - m)], where P is the mole fraction of the complexed species.Öğe CONFORMATION OF DIOXO-POLYOXA CYCLOALKANES BY H-1-NMR .1. STRUCTURE OF FREE 2,6-DIOXO-1,4,7,10,13,16-HEXAOXACYCLO-OCTADECANE BY 500 MHZ PROTON SPIN-SPIN SIMULATION(Marcel Dekker Inc, 1987) ERK, C[Abstract Not Available]Öğe THE DETERMINATION OF ASSOCIATION CONSTANTS OF NA+, K+, MG-2+ AND CA-2+ COMPLEXES WITH 1,4,7,10-TETRAOXACYCLODODECANE (12 CROWN 4) IN DHO BY MEANS OF C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .2.(R Oldenbourg Verlag, 1987) YURDAKOC, K; ERK, C[Abstract Not Available]Öğe THE DETERMINATION OF ASSOCIATION CONSTANTS OF NA+, K+, MG-2+ AND CA-2+ COMPLEXES WITH 1,4,7,10-TETRAOXACYCLODODECANE, (12.CROWN.4) IN DOH BY THE AID OF C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS(Marcel Dekker Inc, 1987) YURDAKOC, MK; ERK, C[Abstract Not Available]Öğe THE DETERMINATION OF STABILITY OF MACROCYCLIC ETHER COMPLEXES BY USE OF C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .4. DETERMINATION OF FREE-ENERGY OF COMPLEX-FORMATION OF LI+, CA-2+ AND MG-2+ WITH 1,4,7,10-TETRAOXACYCLODODECANE, (12.CROWN.4) IN METHANOL-D AND DOH SOLUTIONS(Elsevier Science Bv, 1988) ERK, C[Abstract Not Available]Öğe DETERMINATION OF THE ASSOCIATION CONSTANTS OF MACROCYCLIC ETHERS BY THE AID OF C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .1. LI+, MG2+ AND CA2+ COMPLEXES OF 1,4,7,10-TETRAOXACYCLODODECANE(Marcel Dekker Inc, 1985) ERK, C[Abstract Not Available]Öğe DETERMINATION OF THE COMPLEXING CONSTANTS BY THE AID OF C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .3. COMPLEXING OF 15-CROWN-5 AND 18-CROWN-6 WITH NA+,K+ AND CA2+ IN DHOX(Marcel Dekker Inc, 1986) OZKAN, E; ERK, C[Abstract Not Available]Öğe THE DIPOLE-DIPOLE RELAXATION-TIME AND INTERNAL MOTIONS OF THE CYCLIC OLIGOETHERS .3. THE ACTIVATION-ENERGIES OF PSEUDOROTATION OF 1,4,7,10-TETRAOXACYCLODODECANE AND ITS LI+, CA-2+ AND MG-2+ COMPLEXES, (+)(Marcel Dekker Inc, 1986) ERK, C[Abstract Not Available]Öğe EFFECT OF EU(FOD)3 ON THE C-13 NMR-SPECTRA OF MACROCYCLIC ETHERS AND POLYOXA-LACTONES(Springer Verlag, 1983) ERK, C[Abstract Not Available]Öğe HOST-GUEST INTERACTION MECHANISMS WITH C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .5. EQUILIBRIUM-CONSTANTS OF POTASSIUM AND SODIUM ACETATES COMPLEXING WITH 18 - CROWN - 6 IN CH3OD(Elsevier Science Bv, 1989) ERK, C[Abstract Not Available]Öğe THE HOST-GUEST INTERACTION OF MACROCYCLIC ETHERS BY C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .7. THE COMPLEXING OF DICYCLOHEXANO-18-CROWN-6 WITH K+ AND NA+ ACETATES IN METHANOL-D(Elsevier Science Bv, 1991) ERK, CThe C-13 dipole-dipole relaxation times of the mixture of anti and syn isomers of free and complexed with Na+ and K+ dicyclohexano -18-Crown-6 were measured at 15 MHz The equilibrium constants, K(e) of each C-13 segment acting as a ligand site, were determined in methanol-d solution by the 1/K(e) [L0]n+m-1 = (1-np')n(1-mp')m/p' relationship where p' = p10/[1+p10(m-1)] which is the function of mole fraction of the complexed ligand p10 of expected stoichiometry.Öğe THE ION DIPOLE INTERACTION MECHANISM OF MACROCYCLIC ETHERS WITH C-13 DIPOLE DIPOLE RELAXATION-TIME MEASUREMENTS .9. THE STABILITIES OF 18-CROWN-6 COMPLEXES WITH NA+ AND K+ IN D2O AND METHANOL-D(Elsevier Science Bv, 1991) ERK, CThe stabilities of various stoichiometries of the 18-crown-6 ether complexes with Na+ and K+ in methanol-d and D2O were estimated by means of an NMR method using C-13 T1 relaxation time measurements. The experimental coordination conditions were established by maintaining an identical ion/ligand concentration. The evidence was evaluated using the expression of dependence of the mole fraction of the bound ligand, P(AE), to the experimental dipole-dipole relaxation time, T1obs: P(AE) = (1/T1obs - 1/T(E))/(1/T(AE) - 1/T(E)). The equilibrium constants K(e) for complex formation were obtained through the expression and regression of 1/K(e)[E0]n+m-1 = (1 - nP')n(1 - mP')m/P' where P' = P(AE)/(1 + P(AE)(m - 1)). The existence of various n:m ratios of complexes in solution has also been verified with the simulation of the T(AE) behaviour of each stoichiometry.Öğe THE ION-DIPOLE INTERACTION MECHANISM OF MACROCYCLIC ETHERS WITH C-13 DIPOLE-DIPOLE RELAXATION-TIME MEASUREMENTS .6.(Amer Chemical Soc, 1990) ERK, C[Abstract Not Available]Öğe OLIGOMERIC CYCLIC ESTERS FROM OXAALKANEDICARBOXYLIC ACIDS AND OXAALKANEDIOLS .2. CHIRAL DERIVATIVES OF DIOXOTETRAOXACYCLOALKANES AND DIOXOPENTAOXACYCLOALKANES(Huthig & Wepf Verlag, 1984) ERK, C[Abstract Not Available]Öğe OLIGOMERIC CYCLIC ESTERS FROM OXAALKANEDICARBOXYLIC ACIDS AND OXAALKANEDIOLS .3. FORMATIONS OF MACROCYCLIC OLIGO(ETHER-ESTER)S(Huthig & Wepf Verlag, 1984) ERK, C[Abstract Not Available]
