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SPEKTROSKOPI SENYAWA ORGANIK

KIMIA ORGANIK II. SPEKTROSKOPI SENYAWA ORGANIK. Mengapa belajar spektroskopi ?. Penentuan struktur. SPEKTROSKOPI MASSA. Mengukur massa (BM) Informasi mengenai struktur. Spektrum massa. Interpretasi spektra massa.

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SPEKTROSKOPI SENYAWA ORGANIK

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  1. KIMIA ORGANIK II SPEKTROSKOPI SENYAWA ORGANIK

  2. Mengapabelajarspektroskopi? • Penentuanstruktur

  3. SPEKTROSKOPI MASSA • Mengukurmassa (BM) • Informasimengenaistruktur

  4. Spektrummassa

  5. Interpretasispektramassa • Info penting: BM senyawa. (Cont: heksana 86, heksena 84, heksuna 82) • Spektrometermassafokusganda (resolusitinggi): mengukurmassasampai 4 angkadibelakangkoma rumusmolekuldapatditentukan. (Cont.: C5H12: 72.0939 ; C4H8O: 72.0575).

  6. Awas! • Yang teramatiadalah “exact mass”, bukan “molecular weight”

  7. Kelimpahan alami beberapa isotop

  8. Massa eksak beberapa isotop

  9. Interpretasispektramassa • Adasenyawa yang ion molekulnya (M+) sangattidakstabilsehinggatidakteramati.  bisadiatasidengan ‘ionisasilunak’.

  10. Interpretasispektramassa • Spektrummassadapatdigunakansebagai ‘sidikjarimolekul’  dibandingkandengan data ‘library’ • Polafragmentasi: informasipentingbagipenentuanstruktur.

  11. Soallatihan • 12.2

  12. GugusFungsi & Fragmentasi

  13. Soallatihan • 12.3

  14. SPEKTROSKOPI DAN SPEKTRUM ELEKTROMAGNETIK

  15. SpektroskopiInframerah

  16. Spektrum IR

  17. Manfaatspektrum IR • Identifikasigugusfungsi • “Sidikjari” senyawa

  18. Serapankhasgugus-gugusfungsi

  19. SPEKTROSKOPI ULTRAVIOLETp. 500 - 503

  20. Transisielektron

  21. Spektrum UV

  22. Soallatihan

  23. Soallatihan • 14.13 • 14.14 • 14.30 • 14.31 • 14.46 • 14.47

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