The regioselective synthesis of easily isolable pure bismethano derivatives of C60 and C70 with high steric congestion is described using 1,3-dibenzoylpropane bis-p-toluenesulfonyl hydrazone as the addend precursor. When the addition occurs at two [6,6] ring junctions within the same hexagon, bisadducts with mirror symmetry are obtained for both C60 and C70. When the addition occurs at two [5,6] ring junctions in C60, a symmetrical adduct is formed, which readily undergoes photo-oxygenation and ring opening to yield a fullerene with a hole in the cage. In this work, we also propose a simple and general system to name all of the possible [6,6] bisadduct isomers on C70.
Immigrant sentiment, measured by the number of state laws enacted to curb the flow of undocumented immigration or expand rights to immigrants, have been on a steady incline since September 11, 2001. Despite the increased attention to unauthorized immigration, little research has examined how immigrant policies are affecting group identity (i.e., linked fate). Linked fate is a form of collective group identity that develops when a group of people experience discrimination and marginalization. Using a unique database that merges the 2012 Collaborative Multiracial Post-Election Survey (n = 934 Latinos) with the sum of state-level immigration policies enacted from 2005 to 2012, this study is the first to examine the direct relationship between immigrant climate and linked fate. Results from our multinomial logistic regressions indicate that the linked fate among Latinos increases as the number of punitive immigration laws in a state increases, controlling for a vector of control variables. Consistent with our theory regarding differential impact, our findings also suggest that immigration laws have a more pronounced influence on the linked fate of foreign-born Latinos.
Using a purification method introduced earlier based on redox properties it was possible to isolate Sc3N@I(h)-C80 and Sc3N@D(3h)-C78 and a mixture of Sc3N@D(5h)-C80 and Sc3N@D3-C68. Taking advantage of their chemical reactivity differences, Sc3N@D(5h)-C80 was isolated from Sc3N@D3-C68 followed by further functionalization, giving rise to five new methano-derivatives of Sc3N@D(5h)-C80.
Reactivity Differences of Sc 3N@C2n (2n: 68 and 80). Synthesis of the First Methanofullerene Derivatives of Sc 3N@D5h-C80. -Using a purification method introduced earlier based on redox properties, it is possible to isolate Sc 3N@Ih-C80 and Sc3N@D3h-C78 and a mixture of Sc3N@D5h-C80 and Sc3N@D3-C68. Taking advantage of their chemical reactivity differences, Sc 3N@D5h-C80 is isolated from Sc3N@D3-C68 followed by further functionalization, giving rise to five new methano-derivatives of Sc 3N@D5h-C80. -(CERON, M. R.; IZQUIERDO, M.; ALEGRET, N.; VALDEZ, J. A.; RODRIGUEZ-FORTEA, A.; OLMSTEAD*, M. M.; BALCH, A. L.; POBLET, J. M.; ECHEGOYEN, L.; Chem. Commun. (Cambridge) 52 (2016) 1, 64-67, http://dx.doi.org/10.1039/C5CC07416A ; Dep. Chem., Univ. Calif., Davis, CA 95616, USA; Eng.) -S. Adam 08-102
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