Kapitel 10. Allg. Alkaloide Flashcards

1
Q

pKb Wert von Alklaoide

pKb=

A
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2
Q

Löslichkeit der Alkalodie

S=?

-Bsp:

S0= 0,5g/l

Kb= 5x10-5

pH= 7

-Gesamtlöslichkeit berechnen ohne Angabe S0

A
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3
Q

Titrieren von Basen

pH-Wert der Base (Alkaloid) am Äquivalenzpunkt

A
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4
Q

Nernst’sches Verteilungsgesetz

KT=?

Voraussetzungen :

A
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5
Q

Stoffanteil α der in Phase I verbleibt

α=

Rechnung: KT ist 8

20ml wird 3x mit 20ml ausgeschüttelt

A
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6
Q

Cinchonae cortex

  • Chinin - Chinidin
  • Cinchonidin -Cinchonin
A
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7
Q
  • Chinin - Chinidin
  • Cinchonidin - Cinchonin
A
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8
Q

Purindrogen

  • Purin
  • Xanthin - Coffein
  • Theophyllin - Theobromin
A
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9
Q

Murexid- Reaktion

  • Aussgangs Eddukt
  • Zw- Produkte Alloxan & Uramil
A
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10
Q
  • Coffein
  • Chlorogensäure ( Chinasäureester)
A
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11
Q

Ipecacuanhae Radix (EuAB)

  • Emetin - O-Mehtylpsychotrin
  • Cephaelin - Psychotrin
A
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12
Q

Nachweisreaktion für Tropansäurealkaloide

A
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13
Q

Belladonna folium

  • Scopoletin - Cuskhygrin
A
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14
Q

Opiumalkaloide

  • Morphin & Codein - Thebain
  • Papaverin - Noscapin (Narcotin)
A
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15
Q

Fructus Piperis nigri

  • trans Piperin
  • Piperanin
  • Piperettin
  • Piperolein A
A
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16
Q

Sie führen eine quanitative Bestimmung eines Alkaloids (pKb = 5) titrimetrisch mit 0,1N HCl durch.

Berechnen Sie den pH-Wert am Umschlagspunkt. ( Formel und Rechenweg angeben)

A

Kw = 10-14 (Ionenproudkt des Wassers)

pKb = -log Kb

17
Q

Chinarinde:

  • Definition laut Arzneibuch,
  • Schnelle qualitative und quantiative Nachweisreaktionen nennen
A
18
Q
  • Hyoscyamin
  • Apoatropin
  • Belladonnin
A