On the Electronic Nature of a Butadienyl Biradical – Experiments and ab initio MO Calculations

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1999

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…Also of interest, with respect to our experimental efforts to determine the spin state of the intermediates ( 11a − c ), is the finding that the reaction proceeds on the singlet surface throughout and there is a considerable energy difference between the singlet and triplet states. This has been confirmed very recently by trapping experiments . A third point which we would like to make considers the 1,6- vs 1,7-ring closure.…”

Section: Discussionsupporting

confidence: 63%

Transannular Ring Closure of 10-Membered Cyclic Diynes: Model Calculations

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1999

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Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…At higher temperatures, it cyclized to naphthalene ( 7 ) via the 1,5-dehydronaphthalene ( 6 ) intermediate. In line with these observations were experiments with 1,6-cyclodecadiyne ( 8a ) and some of its derivatives . When N , N ′-diisopropyl-1,6-diazacyclodeca-3,8-diyne ( 8b ) was heated with hydrocarbons, or the parent system 8a was treated with CCl 4 , (SCN) 2 , or BrCN, the products were rationalized by assuming bicyclo[4.4.0]deca-1,6-dien-2,7-diyl ( 12 ) as intermediate (see Schemes and ). , …”

Section: Introductionmentioning

confidence: 74%

Interplay between 1,3-Butadien-1,4-diyl and 2-Buten-1,4-dicarbene Derivatives: The Quest for Nucleophilic Carbenes

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2013

Self Cite

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…For 7, an activation energy of 28.9 kcal/mol was reported. 12 During our studies of 7, 8, and related heterocyclic derivatives, 11,13 we noticed a lower activation energy when X in 7 was replaced by hetero atoms. 14 This observation encouraged us to look closer at the In this paper, we present the results of model calculations on alkynes with different substituents such as F, Cl, OH, SH, NH 2 , and CN.…”

Section: ■ Introductionmentioning

confidence: 76%

Dimerization of Two Alkyne Units: Model Studies, Intermediate Trapping Experiments, and Kinetic Studies

Fabig

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2015

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