carbonyl chemistry 1 addition reactions

... group is attached C None of the above is correct ANSWER KEY B C A C B C B A C 10 C 11 B 12 B 13 B 14 B marks X 14 = 70 marks Notes to the student: If you get items or more correct you can consider ... 34 Ethyne is built from hydrogen atoms (1s1) and carbon atoms (1s22s22px12py1) The carbon atom doesn’t have enough unpaired electrons to form four bonds (1 to the hydrogen and three to the other ... An orbital view of the bonding in ethene Ethene is built from hydrogen atoms (1s1) and carbon atoms (1s22s22px12py1) The carbon atom doesn’t have enough unpaired electrons to form the required...

Ngày tải lên: 28/03/2014, 19:20

... Chlorine 11 0 Chlorine a n d H y d r o g e n 12 4 Bromine 14 2 Bromine and H y d r o g e n 14 8 Chlorine a n d B r o m i n o 15 1 Iodine 15 1 Iodine and H y d r o g e n Iodine and Chlorine 15 8 16 8 Fluorine ... acid Sulphuric acid Carburetted hydrogen, from stagnant water Olefiantgas 13 "7 14 4 15 *2 15 *4 15 *3 10 -1 19*9 25*4 6*3 5*3 Thus then, at the end of a paper on a physical subject, does JDalton ... P«08 368 860 300 360 3 61 864 366 307 308 360 369 870 370 373 878 377 895 899 ,430 434 437 474 • 480 484 486 486 487 fiO9 613 617 619 8 21 622 628 623 623 6 31 634 634 6 41 644 646 646 648 634...

Ngày tải lên: 09/05/2014, 17:08

... Chem 19 86, 51, 432 13 Brown, H.; Bhat, K S J Am Chem Soc 19 86, 10 8, 5 919 14 Brown, H.; Bhat, K S J Am Chem Soc 19 86, 10 8, 293 15 Brown, H.; Jadhav, P K.; Bhat, K S J Am Chem Soc 19 88, 11 0, 15 35 16 ... 29:30 % ee 31 93 46 :1 99 32 90 60 :1 99 33 35 1: 1 24 34 29 19 :1 98 35 traces 36 95 30 :1 98 37 95 19 :1 99 38 65 8 :1 92 39 68 32 :1 98 23 Chapter Introduction to Enantioselective Allylic Addition and ... Anti/syn er 15 1. 0 80 80/20 (E) -16 1. 0 68 98/2 83 /17 (Z) -16 1. 0 72 2/98 80/20 15 0 .1 40 76.5/23.5 Denmark et al reported the addition of allyltrichlorosilane 15 , (E) -16 , (Z) -16 to benzaldehyde,...

Ngày tải lên: 12/09/2015, 09:07

... ee/%b 18 84 10 18 75 45 18 73 60 24 51 43 24 53 33 24 50 47 18 51 30 10 5a 10 5b   10 5c 10 5d 10 5e 10 5f 10 5g 32       Chapter 2  24 82 18 40 28 18 64 13 16 20 18 23 24 31 10 10 5h 10 5i 10 10 5j 11 10 5k ... with 10 2f a Entry Maleimides R2 Time(mins) 10 4 Yield/%a 10 3b Me 60 10 4g 70 10 3c Et 60 10 4h 99 10 3d Ph 20 10 4i 94 10 3e 2,6-iPr2-C6H3 10 0 10 4j 91 103f 2-C6H5-C6H4 40 10 4k 96 10 3g 3-Cl-C6H4CH2 90 10 4l ... iPr iPr 210 - 26 71 22d tBu tBu 210 - 99 22g Bn Me 15 0 1: 1.5 92 98/ 97 22h Bn Et 15 0 1: 1 90 90 22i Et tBu 15 0 1: 1.3

Ngày tải lên: 16/10/2015, 15:35

... ee 11 K Fuji, M Node, H Nagasawa, Y Naniwa, T Taga, K Machida and G Snatzke, J Am Chem Soc., 19 89, 11 1, 79 21- 7925 12 R Tamura, K.-i Watabe, N Ono, Y Yamamoto, J Org Chem., 19 92, 57, 4895-4903 13 ... CH2 Cl2 , rt R CO 2Et B Scheme 1. 6 Reactions of MBH carbamate 1. 2 Asymmetric tandem CA-E reactions M M Sá, M D Ramos and L Fernandes, Tetrahedron, 2006, 62, 11 652 -11 656 M Ciclosi, C Fava, R Galeazzi, ... 12 7, 13 450 -13 4 51 Chapter (10 mol%) N O OR OAc N O CO2 Me Ph + N Ph t Bu Ar OMe CO 2tBu Ph Br R = allyl Ar = 9-anthracenyl N=CPh2 CsOH H 2O (10 eq) CH2 Cl2 , -78o C 30h, 92%, 92% ee Scheme 1. 12...

Ngày tải lên: 14/09/2015, 14:12

... Botti, A Celeste, Appl Phys A 67 (19 98) 4 21 [10 ] S Botti, R Ciardi, M.L Terranova, V Sessa, S Piccirillo, M Rossi, M Vittori-Antisari, Appl Phys Lett 80 (2002) 14 41 [11 ] S Botti, R Ciardi, M.L Terranova, ... Sandrin, 400 [14 ] [15 ] [16 ] [17 ] [18 ] S Botti et al / Chemical Physics Letters 3 71 (2003) 394–400 F.Q Wei, S Contarini, L De Angelis, C Gariazzo, P Nataletti, G.R Morrison, Rev Sci Instrum 66 (19 95) ... Synchrotron Rad News 12 (19 99) 40 R Scholz, U G€sele, E Niemann, F Wischmeyer, Appl o Phys A 64 (19 97) 11 5 L.-O Bjorketun, L Hultman, I.P Ivanov, Q Wahab, J.-E Sundgren, J Cryst Growth 18 2 (19 97) 379 J...

Ngày tải lên: 16/03/2014, 15:08

... Nucleophilic Reactions Cycloaddition 11 0 11 0 11 0 11 1 11 1 11 1 11 2 11 2 11 2 11 2 11 3 11 3 11 3 11 3 11 3 1, 2-Benzisothiazoles, their 1- Oxides, and their 1, l-Dioxides Synthesis Reactions 11 4 11 4 11 5 1, 2-Benzisoselenazoleand ... 1, 3,4-Thiadiazoles 1, 3,4-Selenadiazoles 14 5 14 5 14 6 14 6 14 6 14 6 14 7 14 7 14 7 14 7 14 8 14 8 14 8 14 8 14 8 14 9 14 9 14 9 15 0 15 0 15 1 15 2 15 2 15 3 15 3 15 3 15 3 15 4 15 5 15 5 15 5 15 6 15 7 15 8 15 8 15 8 15 9 15 9 16 0 16 0 xiv ... Five-membered Ring Systems ByG K Boyd 16 1 16 1 16 1 16 2 16 2 16 2 16 3 16 3 16 3 16 3 16 4 16 4 16 4 16 5 16 5 16 5 16 5 16 6 16 6 16 6 16 6 16 6 16 7 16 7 16 7 Introduction 16 7 Reviews 16 8 Systems with One Heteroatom,...

Ngày tải lên: 22/03/2014, 19:20

... ‘unmask’ a carbonyl group R O  The Chemistry of C-C π-Bonds - 15 - Pericyclic reactions: Reaction with Osmium tetroxide OH R1 OH R1 R2 R2 Mechanism: O O O O Os O R1 O O Os O R1 R2 R1 R2 R2 H2O ... result of conjugation Conjugate addition reactions: catalysed by acid or by base Kinetic and thermodynamic (1, 2 va 1, 4 addition) Reactions controlled by charge Reactions controlled by orbitals ... reoxidant: O OH R1 OH R2 N O because the reaction demands a specific stereochemical outcome (a consequence of the concerted 1, 3-dipolar cycloaddition) OH R1 OH OH Rotate R1 R2 R2 OH OH R1 R2 R1 R2 OH...

Ngày tải lên: 22/03/2014, 20:20

... phần % 81 35 81 35 Br (M= 81) C 18 ,98% D 15 ,95% 79, 319 - 79 = 0, 319 A=79, 319 79 35Br 81 - 79, 319 = 1, 6 81 (M=79) 81 0, 319 81  %35 Br  0, 319 %35 Br  10 0% 1, 6 81  0, 319 %79 Br 1, 6 81 35 81  % ... trị m a là: A 11 1,84g 15 7,44g B 11 1,84g 16 7,44g C 11 2,84g 15 7,44g D 11 2,84g 16 7,44g Câu 18 Chia hỗn hợp kim loại A, B có hóa trị không đổi thành phần nhau: - P1 tan hết dd HCl tạo 1, 792 lit H2 ... thu 5 ,1 gam muối khan Giá trị V A 1, 12 L B 1, 68 L C 2,24 L D 3,36 L Hƣớng dẫn giải MCO3  2HCl  MCl  H2O  CO2  4g 5 ,1 g x mol mtăng = 5 ,1 – = 1, 1 g mol mtăng = 11 g M + 71 M +60 1, 1 = 0 ,1 (mol)...

Ngày tải lên: 31/03/2014, 07:02

... 1. 25 1. 24 0.77-0.82 0.66 0.72 0.55 0.72 0.25-0.35 b/V 0 .11 - 0.I2 0 .11 6 - 0 .13 0 .12 1~ 12 0 .10 .0 .12 I - 0 .13 0 .10 0 .14 0 ~10 -0 .14 -log(j,jA cm -2) 12 .67- 14 .18 12 .20 10 .77 -12 .08 10 .77- 12 .08 10 .33 ... References [1] [2] [3] [4] [5] [6] [7] [8] [9] [t0] l 11] [~ 2] [t3] [14 ] [15 ] [16 ] [17 ] [18 ] [19 ] [20] P W Staal, US 3424659 (19 69); Chem Abstr,, 19 69, 71, 912 8 G Richter, Chem Ing Teeh., 19 75, 47, ... Adamantane 1, 1,2-Trimethylcyclopropane 1, 1,2,2-Tetramethylcyctopropane 2-Methylbut-2~ene 2,3-Dimethylbut-2-ene Ep,'2 V VS, sce Ref 3 .10 3 .10 3.08 2.70 2.30 2.05 1. 96 1. 74 [5] [5] [ 11 ] [8] [ 11 ] [ 11 ...

Ngày tải lên: 16/04/2014, 11:20

... N Martin Department of Chemistry, Loughborough University, Loughborough, United Kingdom 1. 1 1. 2 1. 3 1. 4 1. 5 1. 6 1. 7 1. 8 1. 9 1. 10 1. 11 Nitrones and the 1, 3-Dipolar Cycloaddition Reaction ... nitrones 11 4a (26%) and 11 4b (28%) by a [3 þ 2] cycloaddition, although a 22 Nitrones O O N O O O O N ∆ −acetone −CO2 O C O O O N O O (11 2) (11 4a) (26%) (11 3) N O O (11 4b) (28%) i O O OH NH2 (S)- (11 7) ... by the 1, 3-ATP Process 1. 11. 2 Intramolecular Oxime–Alkene Cycloaddition 1. 11. 3 Intramolecular Nitrone–Alkene Cycloadditions 1. 11. 4 Isoxazolidines...

Ngày tải lên: 09/05/2014, 17:06

... 60 63 71 10.4 18 .5 5.5 29.7 36.2 38.8 43.7 Tr/- Tetra- Penta- Hexa- Hepta- Higher 9.3 8.6 13 .9 11 .6 46.2 12 .3 17 .8 13 .2 19 .5 13 .2 28 .1 13.7 36.7 3.7 8.2 9.9 3.2 9.6 8.7 4 .1 3.2 7.2 8.4 1. 8 7.3 ... p-gentiobiose(G-O-p-D-glucopyranosyl-p-D-glucopyranose) 0 .1% 0.2% 0.4% 0 .1% 0.3% 4.2% 0 .1% 3.4% Source: From A Thompson et al., Acid Reversion Products from D-Glucose, J Am Chem Soc., Vol 76, pp 13 0 13 11, 19 54 Figure 4 -14 Structure of ... 1. 09; sucrose 0.89 sucrose 4 -1 starch 7.8; cellulose 1. 0 cellulose 0. 71 cellulose Vegetables Carrot 9.7 Onion 8.7 Peanuts Potato 18 .6 17 .1 Sweet corn 22 .1 sucrose 12 -17 Sweet potato 26.3 glucose...

Ngày tải lên: 23/05/2014, 13:23

... +1. 43 O -0.43 1. 85 3.75 3.35 1. 70 2.45 2.65 1. 04 x 10 ~3 3.9X10"4 Hard Green Phosphoric Acetic Lactic Citric -1. 14 -1. 14 -1. 14 -1. 28 1. 65 3.00 4.50 3.50 2.25 2.95 2.60 2.60 7.52 x 1Q-3 1. 75 x 10 ~5 ... vaEthyl mercaptan x 10 9 rious compounds ranges widely Table 7 -11 1, 3-Xylen-4-ol 2x10 12 indicates a range of about eight orders of ji-Xylene 2x10 magnitude (Teranishi 19 71) This indicates that ... 4.50 3.50 2.25 2.95 2.60 2.60 7.52 x 1Q-3 1. 75 x 10 ~5 1. 26 x 1Q-4 8.4 x 1Q-4 Intense Vinegar Sour, tart Fresh Propionic -1. 85 3.70 2.90 1. 34 x 10 ~5 Found In Sour, cheesy Grape Apple, pear, prune,...

Ngày tải lên: 23/05/2014, 13:24

... 19 2 .12 11 6.07 17 8 .14 60.05 73.07 64.04 58.04 17 8 .14 90.08 67.05 27.33 75.05 OO 1. 4 18 1.00 0.63 59.0 OO 14 4.0 OO 14 7.0 8x10~ 3.7x10~5 8.2 xlO" x10~3 2.5 x 10 "4 (gluconic acid) 1. 37 x 1Q-4 x 1Q-4 ... 1Q-4 7.52 x 10 ~3 1. 04x1 0~3 2.4x10-® 1. 77 x 10 "5 3.9 XlO" 3x10~ xlO" 6.23 x 10 ~8 5.55x1 0~5 Structure Empirical formula Physical form Molecular weight Equivalent weight Sol in water (g /10 0ml_ solv.) ... et al 19 97; Six 19 94) Rosemary and sage are the most potent antioxidant spices (Schuler 19 90) The active principles in rosemary are carnosic acid and carnosol (Figure 11 -3) Anti- Table 11 -4 Properties...

Ngày tải lên: 23/05/2014, 13:27

... Acidsâ•… 11 1 Chemistry Lesson: Four Kinds of Protein â•…â•…Structureâ• 11 3 Denaturing Proteinsâ•… 11 4 Milkâ• 11 6 Eggsâ• 11 7 Meatâ• 11 8 Enzymesâ• 11 9 Shorteningâ• 11 9 Glutamateâ• 11 9 Cheeseâ• 12 0 Recipe: ... them: Flour Sugar Ratio 1. 5 1 150.00% 2.75 1. 5 18 3.33% 1. 5 13 3.33% 1. 5 1 150.00% 2 10 0.00% 2 15 0.00% 2 10 0.00% 2.5 1 250.00% 2 15 0.00% 2.5 2 12 5.00% Mean 14 9 .17 % 43.47% Standard Deviation ... Equipmentâ• 16 8 11 Heatingâ• 17 1 Browning Reactions •… 17 2 Protein Denaturingâ•… 17 5 Culinary_final(i-xvi -1- 240).indd 10 8/23 /11 5:03 PM Volume Reducing and Dryingâ•… 17 6 Flavor Producingâ•… 17 6...

Ngày tải lên: 29/05/2014, 15:25

Ngày tải lên: 07/06/2014, 20:24

... BaTiO3 (BTO)–CaCu3Ti4O12 (CCTO) composite screenprinted thick films for high dielectric constant devices in the medium frequency (MF) range Mater Sci Eng B 2004, 11 1 :11 3 -12 3 16 Yu H, Liu H, Hao ... properties of CaCu3Ti4O12 ceramics modified by SrTiO3 Mater Lett 2008, 62 :13 53 -13 55 17 Du G, Li W, Fu Y, Chen N, Yin C, Yan M: An investigation on the solid-state reactions in CaCu3Ti4O12-ZnNb2O6 system ... for the CC3.1TO and CC3.1TO-Al2O3 pellets Compared with the CC3.1TO sample, a significant improvement in the dielectric constant of the CC3.1TO-Al2O3 samples was observed For the CC3.1TO sample,...

Ngày tải lên: 20/06/2014, 23:20

... 47.7 51. 1 52.5 3e 3f 45.5 50 44.4 51. 1 2g 15 .3 16 .6 - - 2g 51. 1 48.8 3g 48.8 44.4 3a 20 19 .3 - - Fluconazole 81. 1 77.7 3b 15 15 .6 - - 3c 3d 15 .3 16 .6 16 .6 14 .6 - - 3e 16 .6 18 .3 - - 3f 15 .3 16 .6 ... aureus Bacillus Subtilis 2a 2b 12 8 64 12 8 12 8 3a 3b 64 12 8 64 12 8 2c 12 8 12 8 3c 12 8 12 8 2d 12 8 12 8 3d 12 8 256 2e 12 8 12 8 3e 12 8 64 2f 12 8 256 3f 12 8 12 8 2g 12 8 12 8 3g 12 8 64 Ciprofloxacin 5 Conclusions ... flavus 2a 15 .6 16 .3 - - 2a 51. 1 58.8 3a 52.5 51. 1 2b 2c 18 .6 16 .3 15 .6 15 .6 - - 2b 50 44.4 3b 48.8 45.5 2c 48.8 50 3c 51. 1 50 2d 17 .6 16 .3 - - 2d 52.5 48.8 3d 55.5 52.5 2e 16 15 .3 - - 2f 15 .6 14 -...

Ngày tải lên: 21/06/2014, 06:20

... Colorless solid (92%) 1H NMR 1. 41 (6H, s), 1. 99-2 .11 (2H, m), 2 .18 -2.24 (2H, m), 2,32 (3H, s), 2.88-2.98 (2H, m), 3. 21- 3.39 (2H, m), 3.50-3.57 (1H, m), 3.683.72 (1H, m), 4.06-4 .10 (1H, m), 4.66 (2H, ... (23%) 1H NMR 1. 40 (6H, s), 2. 01- 2.09 (2H, m), 2 .18 -2.25 (2H, m), 2.92-2.94 (2H, m), 3. 51- 3.53 (1H, m), 3.66-3.72 (1H, m), 4.00-4 .13 (2H, m), 4.75 (2H, s), 4.85-4.87 (1H, m), 4.97 (1H, s), 7 .16 (1H, ... (69%) 1H NMR 1. 41 (6H, s), 2.03-2 .10 (2H, m), 2 .19 -2.25 (2H, m), 2.94-2.97 (2H, m), 3.67-3.72 Kato et al Organic and Medicinal Chemistry Letters 2 011 , 1: 7 http://www.orgmedchemlett.com/content /1/ 1/7...

Ngày tải lên: 21/06/2014, 06:20

... in Kanagarajan et al Organic and Medicinal Chemistry Letters 2 011 , 1: 8 http://www.orgmedchemlett.com/content /1/ 1/8 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Mycobacterium tuberculosis ... 23:3–25 doi :10 .10 16/S 016 9-409X(96)00423 -1 Purser S, Moore PR, Swallow S, Gouverneur V (2008) Fluorine in medicinal chemistry Chem Soc Rev 37:320–330 doi :10 .10 39/b 610 213 c doi :10 .11 86/ 219 1-2858 -1- 8 Cite ... H 7 /15 65/95 2 61 74.55 (74.65) 5.69 (5.82) 12 . 31 (12 .44) 450 C28H26N4O2 F Cl 7 /15 8/20 70/94 55/88 233 260 69.02 (69 .12 ) 64.52 (64.74) 4.77 (4.97) 4.52 (4.66) 11 . 41 (11 .52) 10 .66 (10 .79) 10 Br...

Ngày tải lên: 21/06/2014, 06:20