... 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...
... 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...
... 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...
... 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...
... ‘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...
... 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)...
... N Martin Department of Chemistry, Loughborough University, Loughborough, United Kingdom 1.11. 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...
... 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,...