Zur Chemie der Phosphor‐Stickstoff‐Verbindungen

Riesel, L.

doi:10.1002/zfch.19790190502

Cited by 13 publications

(1 citation statement)

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“…The additional use of the HF donator Et 3 NHF leads to the formation of HPF 5 − , R 2 NHPF 5 , and (R 2 NH) 2 P(O)F . P 4 reacts similarly with NaOR or NaSR in the presence of CCl 4 to give (RO) 3 P and (RS) 3 P, respectively. (RO) 3 P can be converted to (RO) 2 (O)PH by hydrolysis, whereas (RS) 3 P gives (RS) 3 PO under oxidizing conditions.…”

Section: General Trends Of P4 Phosphorus Activationmentioning

confidence: 99%

P₄Activation by Main Group Elements and Compounds

2010

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Contents 1. Introduction 4236 2. The Stability of P 4 Phosphorus with Respect to Its Allotropes and Neutral Polyphosphorus Species 4237 2.1. Allotropic Modifications of Phosphorus 4237 2.2. Stability of Neutral Polyphosphorus Species 4238 3. General Trends of P 4 Phosphorus Activation 4239 3.1. General Remarks 4239 3.2. Degradation of P 4 Phosphorus by Nucleophiles under Maintenance of P n Structural Moieties 4241 4. Activation and Degradation of P 4 Phosphorus by Main Group Elements and Compounds 4243 4.1. Activation of P 4 Phosphorus by Group 1 and 2 Elements and Compounds 4243 4.2. Activation of P 4 Phosphorus by Group 13 Element Compounds 4245 4.3. Activation and Degradation of P 4 Phosphorus by Group 14 Element Compounds 4246 4.4. Activation and Degradation of P 4 Phosphorus by Group 15 Element Compounds 4250 4.5. Activation and Degradation of P 4 Phosphorus by Group 16 and 17 Element Compounds 4251 5. Abbreviations 4252 6. Acknowledgments 4253 7. References 4253

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Section: General Trends Of P4 Phosphorus Activationmentioning

confidence: 99%

P₄Activation by Main Group Elements and Compounds

2010

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Humboldt‐Universität zu Berlin

2017

Geschichte Der Anorganischen Chemie

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Several articulatory strategies are available during the production of /u/, all resulting in a similar acoustic output. /u/ has two main constrictions, at the velum and at the lips. A perturbation of either constriction can be compensated at the other one, e.g wider constriction at the velum by more lip protrusion, wider lip opening by more tongue retraction. This study investigates whether speakers use this relation under perturbation. Six speakers were provided with palatal prostheses which were worn for two weeks. Speakers were instructed to make a serious attempt to produce normal speech. Their speech was recorded via EMA and acoustics several times over the adaptation period. Formant values of /u/-productions were measured. Velar constriction width and lip protrusion were estimated. For four speakers a correlation between constriction width and lip protrusion was found. A negative correlation between lip protrusion and F1 or F2 could sometimes be observed, but no correlation occurred between constriction size and either of the formants. The results show that under perturbation speakers use motor equivalent strategies in order to adapt. The correlation between constriction size and lip protrusion is stronger than in studies investigating unperturbed speech. This could be because under perturbation speakers are inclined to try out several strategies in order to reach the acoustic target and the co-variability might thus be greater.

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