155 research outputs found

    Summer Service Learning — What Distinguishes Students Who Choose to Participate from Those Who Do Not? Part One: Religion, Parents, and Social Awareness

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    Since 1980, 2455 Notre Dame students have participated in the Center for Social Concerns’ Summer Service Project Internship (SSPI), previously referred to as the Summer Service Program, or SSP. Currently, over 200 students choose this experience yearly. These students spend eight weeks working with disadvantaged populations during the summer, as part of a three-credit course. Students have volunteered in homeless shelters, hospitals, soup kitchens, day care centers, schools, and boys and girls clubs in more than 300 cities since the beginning of the program two decades ago

    Generation and characterization of carbonyl ylides from pyrazolinone spirooxiranes

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    Laser flash photolyses of 1-oxa-5,6-diazaspiro[2.4]hept-6-ene-4-ones I (Ar [triple bond] Ph, p-NO2Ph, p-CH3OPh; R1 [tripe bond] CH3, Ph; R2, R3 [triple bond] CH3; R2 [triple bond] Ph, p-NO2Ph, p-ClPh, 2-naphthyl; R3 [triple bond] H) and of the symmetrical oxirane II give rise to transients with absorption spectra in the visible region and lifetimes of the order of 0.3 - 10 [mu]s in benzene at room temperature. Sensitization experiments in some cases indicate that the intermediate may arise from a triplet as well as a singlet excited state. Transients from I are quenched by alcohols and 2,3-dimethyl-2-butene whereas that from II is not. Steady state photolyses of I in methanol give products consistent with the assignment of the structure of the transient as a carbonyl ylide incorporating the pyrazolinone ring.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/31041/1/0000718.pd

    Chemical Reviews

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    The Reaction of Diphenylmethylene with the Carbon-Halogen Bond

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    Dicarbenes. Some Isolable Bisdiazoalkanes

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