865,594 research outputs found
Carbonyl ylide from 3-chloro-3-p-nitrophenylcarbene and acetone
No full textPT: J; CR: BEKHAZI M, 1983, J AM CHEM SOC, V105, P1289 DEMARCH P, 1982, J AM CHEM SOC, V104, P4952 DEMARCH P, 1982, J AM CHEM SOC, V104, P4953 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, UNPUB HUAN Z, 1983, TETRAHEDRON LETT, V24, P2829 LIU MTH, 1972, CAN J CHEM, V50, P3009 LIU MTH, 1982, CHEM SOC REV, V11, P127 MARTIN CW, 1983, J ORG CHEM, V48, P1898 TAKEBAYASHI M, 1970, B CHEM SOC JPN, V43, P1500 UEDA K, 1972, B CHEM SOC JPN, V45, P2779; NR: 11; TC: 22; J9: TETRAHEDRON LETT; PG: 4; GA: D9916Source type: Electronic(1
Liu shi yu dan si ji
No full text劉鳳著.綫裝, 1函.框20.1x13.6公分, 9行18字. 白口, 左右雙邊, 單黑魚尾. 版心上鐫"澹思集", 中鐫卷次, 下鐫葉次及"劉漙卿刻"書名及版式據卷三.書根題"劉侍御澹思集", 每冊書根題後分別錄"樂", "御", "書", "數"見《香港中文大學圖書館古籍善本書錄》(2001, p. 244)鈐有"天一閣", "沈氏鳴野山房圖籍印"Library's copy: 館存卷三至五, 卷九至十六, 共四冊 ; 缺卷一至二[v.1], 卷六至八[v.3]Xian zhuang, 1 han.Kuang 20.1 x 13.6 gong fen, 9 hang 18 zi. Bai kou, zuo you shuang bian, dan hei yu wei. Ban xin shang juan "Dan si ji", zhong juan juan ci, xia juan ye ci ji "Liu Tuanqing ke"Shu ming ji ban shi ju juan san.Shu gen ti "Liu shi yu dan si ji", mei ce shu gen ti hou fen bie lu "Yue", "Yu", "Shu", "Shu"Jian "Xianggang Zhong wen da xue tu shu guan gu ji shan ben shu lu" (2001, p. 244)Liu Feng zhu.Qian you "Tian yi ge", "Shen shi Ming ye shan fang tu ji yin"Library's copy: guan cun juan san zhi wu, juan jiu zhi shi liu, gong si ce ; que juan yi zhi er [v.1], juan liu zhi ba [v.3
Behavior of carbonyl ylide generated from 3-chloro-3-(p-nitrophenyl)diazirine and acetone 1,3-dipolar cycloaddition to benzaldehyde and epoxide formation
No full textPT: J; CR: DEMARCH P, 1982, J AM CHEM SOC, V104, P4952 DEMARCH P, 1982, J AM CHEM SOC, V104, P4953 GILL HS, 1983, J ORG CHEM, V48, P1051 HOUK KN, 1973, J AM CHEM SOC, V95, P7302 HUISGEN R, 1977, ANGEW CHEM INT EDIT, V16, P572 IBATA T, 1986, TETRAHEDRON LETT, V27, P4383 LIU MTH, 1974, TETRAHEDRON LETT, P1329 LIU MTH, 1987, TETRAHEDRON LETT, V28, P1011 MARTIN CW, 1971, J CHEM SOC CHEM COMM, P1438 MARTIN CW, 1971, J CHEM SOC CHEM COMM, P15 MARTIN CW, 1985, J ORG CHEM, V50, P2050 PADWA A, 1969, J ORG CHEM, V34, P2728 SEYFERTH D, 1974, J ORGANOMET CHEM, V67, P341 UEDA K, 1972, B CHEM SOC JPN, V45, P2779; NR: 14; TC: 8; J9: CHEM LETT; PG: 4; GA: L0892Source type: Electronic(1
Transformation of phenylchlorodiazirines to 1,3-dioxolanes and a 1,3-dithiolane
No full textPT: J; CR: FREIDRICH K, 1985, TETRAHEDRON LETT, V26, P193 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, 1982, J AM CHEM SOC, V104, P5549 GRILLER D, 1983, J ORG CHEM, V48, P1359 INDICTOR N, 1969, J CHEM ENG DATA, V14, P76 KIRMSE W, 1971, CARBENE CHEM KIRMSE W, 1981, J AM CHEM SOC, V103, P5935 LIU MTH, 1972, CAN J CHEM, V50, P3009 LIU MTH, 1984, J CHEM SOC CHEM COMM, P1062 LIU MTH, 1984, TETRAHEDRON, V40, P887 MOSS RA, 1973, CARBENES, V1 MOSS RA, 1975, CARBENES, V2 MOSS RA, 1984, TETRAHEDRON LETT, V25, P1023 STEINBECK K, 1979, CHEM BER, V112, P2402 WARNER P, 1984, J ORG CHEM, V49, P3666; NR: 15; TC: 0; J9: HETEROCYCLES; PG: 5; GA: AVW79Source type: Electronic(1
Self quenching reaction of (Phenoxymethyl) chlorocarbene with diazirine
No full textThe combination of laser flash photolysis and product analysis demonstrates that even though (phenoxymethyl)chlorocarbene reacts with its diazirine precursor with a substantial rate constant of 3.5 x 10(8) M(-1)s(-1), the predicted azine product is not formed. These results indicate either carbene/diazirine reversibility or subsequent hydrogen migration of the carbene/diazirine adduct. Also, a rate constant of 2.0 x 10(7) s(-1) for the 12-hydrogen atom migration in (p-nitrophenoxymethyl)chlorocarbene has been determined using the pyridinium ylide technique.PT: J; CR: CHATEAUNEUF JE, 1991, J ORG CHEM, V56, P5942 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 LIU MTH, 1992, J AM CHEM SOC, V114, P3604 LIU MTH, 1992, J PHOTOCH PHOTOBIO A, V63, P115 MORGAN S, 1991, J AM CHEM SOC, V113, P2782 MOSS RA, 1990, J AM CHEM SOC, V112, P5642 MOSS RA, 1990, KINETICS SPECTROSCOP; NR: 7; TC: 6; J9: RES CHEM INTERMEDIATES; PG: 5; GA: ND525Source type: Electronic(1
Energy barrier for 1,2-chlorine migration in α-methyl-αlpha-chlorobenzyl(chloro)carbene
No full textPT: J; CR: BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 BONNEAU R, 1989, J PHYS CHEM-US, V93, P4802 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 LIU MT, UNPUB LIU MTH, 1985, J CHEM SOC CHEM COMM, P982 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 PLATZ MS, 1989, J AM CHEM SOC, V111, P6874 WARNER PM, 1984, TETRAHEDRON LETT, P4211; NR: 8; TC: 5; J9: J CHEM SOC CHEM COMMUN; PG: 3; GA: EL425Source type: Electronic(1
Spectroscopic detection of an arylchlorocarbene-ethyl acetate carbonyl ylide and subsequent oxirane formation
No full textLaser flash photolysis of 3-chloro-3-(p-nitrophenyl)diazirine (1) generates the corresponding ground-state singlet carbene (lambda-max = 310 nm), which reacts with ethyl acetate to form a carbonyl ylide of the ester (lambda-max = 490 nm). The absolute rate constant for ylide formation in CH2Cl2 is k = (2.85 +/- 0.17) X 10(6) M-1 s-1. Subsequent cyclization of the ylide to the corresponding oxirane (lambda-max = 350 nm) occurs with a rate constant of 1.26 x 10(6) S-1 (21-degrees-C) in ethyl acetate with Arrhenius activation parameters for oxirane formation of E(act) = 6.68 +/- 0.19 kcal/mol and log A (s-1) = 11.08 +/- 0.15. The carbonyl ylide is also intercepted with the dipolarophile, diethyl fumarate, with a rate constant of (1.04 +/- 0.07) x 10(7) M-1 s-1. Additionally, solvent polarity effects on (p-nitrophenyl)chlorocarbene reactivity and spectroscopic evidence of oxirane formation (lambda-max = 350 nm) from the related acetone ylide of (p-nitrophenyl)chlorocarbene are presented.PT: J; CR: BONNEAU R, 1989, J CHEM SOC CHEM COMM, P510 BONNEAU R, 1990, J AM CHEM SOC, V112, P744 IBATA T, 1987, CHEM LETT, V28, P2135 LIU MTH, 1972, CAN J CHEM, V50, P3009 LIU MTH, 1987, TETRAHEDRON LETT, V28, P1011 LIU MTH, 1990, J CHEM SOC CHEM COMM, P1482 NAGARAJAN V, 1985, J PHYS CHEM-US, V89, P2330 PAUL H, 1978, J AM CHEM SOC, V100, P4520 PLATZ MS, COMMUNICATION REICHARDT C, 1988, SOLVENTS SOLVENT EFF, P352 SOUNDARARAJAN N, 1988, J AM CHEM SOC, V110, P7143 SOUNDARARAJAN N, 1988, TETRAHEDRON LETT, V29, P3419; NR: 12; TC: 14; J9: J AMER CHEM SOC; PG: 4; GA: GB298Source type: Electronic(1
Activation energy for a 1, 2-hydrogen shift in (phenoxymethyl) chlorocarbene
No full textPT: J; CR: BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 EVANSECK JD, 1990, J PHYS CHEM-US, V94, P5518 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 JACKSON JE, 1988, J AM CHEM SOC, V110, P5595 JACKSON JE, 1989, J AM CHEM SOC, V111, P6874 LAVILLA JA, 1989, J AM CHEM SOC, V111, P6877 LIU MTH, 1987, CHEM DIAZIRINES, V1, P111 LIU MTH, 1989, J AM CHEM SOC, V111, P6873 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 MORGAN S, 1991, J AM CHEM SOC, V113, P2782 MOSS RA, 1990, J AM CHEM SOC, V112, P5642 MOSS RA, 1990, KINETIC SPECTROSCOPY SCAIANO JC, 1988, CHEM KINETICS SMALL, V3, P73; NR: 13; TC: 5; J9: J ORG CHEM; PG: 2; GA: GH369Source type: Electronic(1
Absolute rate constant for the reaction of benzylchlorocarbene with hydrogen chloride
No full textThe rate constant for the reaction of benzylchlorocarbene with HCl is 4.7 x 10(9) dm3 mol-1 s-1.PT: J; CR: BONNEAU R, 1989, J AM CHEM SOC, V111, P5973 BONNEAU R, 1990, LASER CHEM, V10, P267 JACKSON JE, 1988, J AM CHEM SOC, V110, P5595 JACKSON JE, 1989, J AM CHEM SOC, V111, P6874 LIU MTH, 1985, J ORG CHEM, V50, P3218 LIU MTH, 1989, J PHYS CHEM-US, V93, P7298 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 MOSS RA, 1990, J AM CHEM SOC, V112, P5642 MOSS RA, 1990, TETRAHEDRON LETT, P1225; NR: 9; TC: 1; J9: J CHEM SOC CHEM COMMUN; PG: 2; GA: GP557Source type: Electronic(1
Kinetic studies of chloro-p-nitrophenylcarbene with acetone and diethyl fumarate
No full textPT: J; CR: BEKHAZI M, 1983, J AM CHEM SOC, V105, P1289 DEMARCH P, 1982, J AM CHEM SOC, V104, P4952 DEMARCH P, 1982, J AM CHEM SOC, V104, P4953 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, IN PRESS HUAN Z, 1983, TETRAHEDRON LETT, V24, P2829 IBATA T, 1986, TETRAHEDRON LETT, V27, P4383 LIU MTH, 1972, CAN J CHEM, V50, P3009 MARTIN CW, 1983, J ORG CHEM, V48, P1898 TAKEBAYASHI M, 1970, B CHEM SOC JPN, V43, P1500 UEDA K, 1972, B CHEM SOC JPN, V45, P2779; NR: 11; TC: 14; J9: TETRAHEDRON LETT; PG: 4; GA: G4363Source type: Electronic(1
- …
