Výsledky vyhledávání - "Tang-Sheng Peng"

Crystal structures of diastereomeric styrene complexes of the chiral rhenium fragment [(η5-C5H5)Re(NO)(PPh3)]+: effect of ligating enantioface upon bonding and conformation

Autor: Tang-Sheng Peng, Atta M. Arif, John A. Gladysz, Mercedes Sanaú

Publikováno v: Journal of Organometallic Chemistry. 503:235-241

The styrene complex [(η5-C5H5)Re(NO)(PPh3(H2C = CHC6H5)]+BF4−1 (1) can exist as two configurational diastereomers, RS,SR and RR,SS, that differ in the C = C enantioface bound to rhenium. Crystal structures show that the eleven atom (η5-C5H5)Re(NO

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af3137a73becafd538672351416df0f0
https://doi.org/10.1016/0022-328x(95)05565-7

Zobrazit plný text záznamu

A New Alkene Carbon-Hydrogen Bond Activation Reaction: Facile and Stereospecific Vinylic Deprotonation of the Chiral Cationic Rhenium Alkene Complexes [(.eta.5-C5H5)Re(NO)(PPh3)(H2C:CHR)]+BF4

Autor: J. A. Gladysz, Tang-Sheng Peng

Publikováno v: Organometallics. 14:898-911

Alkene complexes [([eta][sup 5]-C[sub 5]H[sub 3])Re(NO)(PPh[sub 3])H[sub 2]C=CHR][sup +] BF[sub 4][sup -] 1; R = a, CH[sub 3]; b, CH[sub 2]CH[sub 2]-CH[sub 3]; c, CH(CH[sub 3])[sub 2]; d, H; e, C[sub 6]H[sub 5]; f, C(CH[sub 3])[sub 3]; [ge] 96:4 RS,S

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3a445902e091fe1d3630beb12b2c340d
https://doi.org/10.1021/om00002a042

Zobrazit plný text záznamu

Nucleophilic additions to the chiral rhenium alkene complexes [Re(η5-C5H5)(NO)(PPh3)(H2CCHR)]BF4(R = H, Me, CH2CH2Me, Ph or CH2Ph): regio-, diastereo- and enantio-selectivities

Autor: John A. Gladysz, Tang-Sheng Peng, Atta M. Arif

Publikováno v: J. Chem. Soc., Dalton Trans.. :1857-1865

Reactions of alkene complexes [Re(η5-C5H5)(NO)(PPh3)(H2CCHR)]BF41(R = H a, Me b, CH2CH2Me c, Ph d or CH2Ph e) and LiCuMe2 in tetrahydrofuran (thf) at –80 °C gave the primary, β-branched alkyl complexes [Re(η5-C5H5)(NO)(PPh3)(CH2CHMeR)]2(79–99

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::02dbc93f7d0b58cad8bb0eadc03c6f45
https://doi.org/10.1039/dt9950001857

Zobrazit plný text záznamu

Generation and Reactivity of Substitution-Labile Dichloromethane and Chlorobenzene Adducts of the Chiral Pentamethylcyclopentadienyl Rhenium Lewis Acid [(.eta.5-C5Me5)Re(NO)(PPh3)]+

Autor: Tang Sheng Peng, John A. Gladysz, Charles H. Winter

Publikováno v: Inorganic Chemistry. 33:2534-2542

Reactions of (η 5 -C 5 Me 5 )Re(NO)(PPh 3 )(CH 3 ) (5) and HBF 4 -OEt 2 in CH 2 Cl 2 (-80 o C) or C 6 H 5 Cl (-45 o C) give the chlorohydrocarbon complexes [(η 5 -C 5 Me 5 )Re(NO)(PPh 3 )(ClCH 2 Cl)] + BF 4- (3) and [(η 5 -C 5 Me 5 )Re(NO)(PPh 3 )

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::746243663fb34c31db83fe89f15045b7
https://doi.org/10.1021/ic00090a011

Zobrazit plný text záznamu

Synthesis and reactivity of bridging bis(alkyl) and bis(alkylidene) complexes derived from the chiral rhenium fragment [η5-C5H5)Re(NO)(PPh3)]+

Autor: Christophe Roger, John A. Gladysz, Tang-Sheng Peng

Publikováno v: Journal of Organometallic Chemistry. 439:163-175

Reactions of Li + [(η 5 -C 5 H 5 ) Re(NO)(PPh 3 )] − and TfO(CH 2 n OTf(0.5 equiv.; a , n = 3; b , n = 4; c , n = 5; d , n = 8) give the bridging bis(alkyl) complexes (η 5 -C 5 H 5 )Re(NO)(PPh 3 (CH 2 ) n (PPh 3 ) (NO)Re (η 5 -C 5 H 5 ) ( 7a-d ,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4d1bb2172f70ed2efe3a664ec770d55f
https://doi.org/10.1016/0022-328x(92)80227-o

Zobrazit plný text záznamu

Synthesis, structure, and reactivity of allene complexes of the chiral rhenium fragment [(.eta.5-C5H5)Re(NO)(PPh3)]+

Autor: Atta M. Arif, Jiaqi Pu, John A. Gladysz, Tang Sheng Peng

Publikováno v: Organometallics. 11:3232-3241

Reactions of the chlorobenzene complex [({eta}{sup 5}-C{sub 5}H{sub 5})Re(NO)(PPh{sub 3})(ClC{sub 6}H{sub 5})]{sup +}BF{sub 4}{sup -} and excess (a) allene, (b) methylallene, and (c) 1,1-dimethylallene give the {pi} adducts [({eta}{sup 5}-C{sub 5}H{s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67c49142aa14693e063b8d04f7d67a28
https://doi.org/10.1021/om00046a020

Zobrazit plný text záznamu

Thermodynamic Enantioface-Binding Selectivities of Monosubstituted Alkenes to a Highly Discriminating Chiral Transition -MetalLewis Acid; equilibration of diastereoisomeric (cyclopentadienyl)(alkene)(nitrosyl)(triphenylphosphine)rhenium complexes ([Re(?5-C5H5)(CH2 = CHR)(NO) (PPh3)]+BF4?)

Autor: Atta M. Arif, John A. Gladysz, Tang-Sheng Peng

Publikováno v: Helvetica Chimica Acta. 75:442-456

Reactions of monosubstituted alkenes RCH = CH2 and [Re(η5–C5H5)(CH2Cl2) (NO)(PPh3)]+BF give complexes ([Re(η5–C5H5))(CH2CHR)(NO) (PPh3)]+BF (1a–g) in 63–99% yields as mixtures of (RS,SR)- and (RR,SS)-diastereoisomers (1a (R = Me), 66:34; 1b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1b9ea3ecd887700c0db69bc3dc964699
https://doi.org/10.1002/hlca.19920750204

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání