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American Chemical Society, Division of Chemical Information, Education Committee: Computer Searching of Chemical Abstracts: General Subject Sample Search.

General Subject Sample Search

Search Topic:

Find articles about kinetics the photochemistry of carbanions.

Strategy:

  1. Identify key terms and how to specify terms:
    • photochem? (retrieves photochemical, photochemistry and the form used in abstracts and indexing — photochem)
    • carbanion? (retrieves carbanion, carbanionic, and carbanions)
  2. Search the above two terms using AND as a Boolean operator to require that both photochem? and carbanion? are in the same record.
  3. Display the short form (CBIB) of the record to see information about selected publications on this topic.
  4. Consider an alternative search method and see the difference in use of (s) to require that photochem? and carbanion? be in the same field which will ensure more precise but less comprehensive searching.

Teaching Points:

CA File:

Search Strategy Table

Search Steps Set Number Number of Documents
File ca
s photochem? and carbanion? L1 147
d L1 sam 3 5
s (photolysis or photochem?) and (carbanion? or org? anion?) L2 196
s L2 not L1 L3 49
s (photolysis or photochem?) (s) (carbanion? or org? anion?) L4 79
d L4 ibib 1
log y

Sample Search

Use the CA file to find relevant articles

=> file ca

FILE 'REGISTRY' ENTERED AT 17:36:18 ON 04 JUN 96 USE IS SUBJECT 
TO THE TERMS OF YOUR CUSTOMER AGREEMENT COPYRIGHT (C) 
1996 American Chemical Society (ACS)

STRUCTURE FILE UPDATES:  31 MAY 96   HIGHEST RN 176894-09-0
DICTIONARY FILE UPDATES:  3 JUN 96   HIGHEST RN 176894-09-0

TSCA INFORMATION NOW CURRENT THROUGH DECEMBER 1995

Search for articles about photochem? and carbanion?

=> s photochem? and carbanion?

        102807 PHOTOCHEM?
          6737 CARBANION?
L1         147 PHOTOCHEM? AND CARBANION?

Display sample format of L1 answers 3 and 5. Indexing may provide ideas for additional search terms. Note the use of “organic anions” as a synonym for “carbanions” in the first sample, and the use of “photolysis” in the second sample.

=> d L1 sam 3 5

L1   ANSWER 3 OF 147  CA  COPYRIGHT 1996 ACS
CC   31-3 (Alkaloids)
TI   Lewis acid complexed heteroatom   carbanions  ; a 
     facile photolytic synthesis of nuciferidine
ST   photolytic synthesis nuciferidine
IT   Ring closure and formation (  photochem  ., facile 
     photolytic synthesis of nuciferidine via Lewis acid 
     complexed heteroatom  carbanions  )
IT   16620-96-5  RL: RCT (Reactant) (facile photolytic 
     synthesis of nuciferidine via Lewis acid complexed  
     *heteroatom  **carbanions  )
IT   134619-96-8P   159335-33-8P   159335-34-9P RL: RCT 
     (Reactant); SPN (Synthetic preparation); PREP (Preparation) 
     (facile photolytic synthesis of nuciferidine via Lewis acid 
     complexed heteroatom carbanions  )
IT   159406-60-7P, (.+-.)-Nuciferidine RL: SPN (Synthetic 
     preparation); PREP (Preparation) (facile photolytic synthesis 
     of nuciferidine via Lewis acid complexed heteroatom   
     carbanions  )

L1   ANSWER 5 OF 147  CA  COPYRIGHT 1996 ACS
CC   35-7 (Chemistry of Synthetic High Polymers)
TI   Synthesis of novel organosilicon-containing oligomers with 
     reactive functional groups through anionic polycondensation 
     reactions
ST   polysilane vinyl pendent prepn; allyl contg polysilane UV 
     crosslinking;  polymn methylstyrene trimethylsilane
IT   Polymerization (of lithiated methylstyrene with 
     bischlorosilanes)
IT   Glass temperature and transition (of polysilanes with 
     main-chain or pendent allyl or vinyl groups)
IT   Polysilanes RL: PRP (Properties); RCT (Reactant); SPN 
     (Synthetic preparation); PREP (Preparation) (prepn. and 
     characterization and UV crosslinking of polysilanes with 
     main-chain or pendent allyl or vinyl groups)
IT   Crosslinking (  photochem  ., of polysilanes with 
     main-chain or pendent allyl or vinyl groups)
IT   622-97-9, 4-Methylstyrene RL: RCT (Reactant) 
     (condensation with lithium diisopropylamide)
IT   4111-54-0, Lithium diisopropylamide RL: RCT (Reactant) 
     (condensation with methylstyrene)
IT   131494-96-7P   158699-96-8P   158699-97-9P RL: PRP 
     (Properties); RCT (Reactant); SPN (Synthetic preparation); 
     PREP (Preparation) (prepn. and characterization and UV 
     crosslinking of)
IT   158699-98-0P   158699-99-1P   158700-00-6P RL: PRP 
     (Properties); RCT (Reactant); SPN (Synthetic preparation); 
     PREP (Preparation) (prepn. and characterization of)
IT   104065-52-3 RL: RCT (Reactant) (prepn. and 
     polycondensation with dichlorosilanes)

Add two new terms “photolysis” and “org? anion?” to the original search query.

=> s (photolysis or photochem?) and (carbanion? or org? anion?)

         63932 PHOTOLYSIS
        102807 PHOTOCHEM?
          6737 CARBANION?
        803352 ORG?
        205747 ANION?
          2821 ORG? ANION? (ORG?(W)ANION?)
L2         196 (PHOTOLYSIS OR PHOTOCHEM?) AND 
               (CARBANION? OR ORG? ANION?)

Use NOT to eliminate the references from L2 which were already found in L1. Note the 42 new references.

=> s L2 not L1

L3          49 L2 NOT L1

Displays answer 1 of set L3 in indented bibliographic format.

=> d L3 ibib 1

L3   ANSWER 1 OF 49  CA  COPYRIGHT 1996 ACS

ACCESSION NUMBER:    124:31150  CA
TITLE:               Photopolymerizable compositions
INVENTOR(S):         Kimura, Yoshio; Watanabe, Masahiro; 
                     Hagiwara, Toshio
PATENT ASSIGNEE(S):  Tokuyama Sekyu Kagaku Kk, Japan; 
                     Showa Denko Kk
SOURCE:              Jpn. Kokai Tokkyo Koho, 13 pp. 
CODEN: JKXXAF
NUMBER DATE
--------------          ------
PATENT INFORMATION:      JP 07053614 A2    950228  Heisei
APPLICATION INFORMATION: JP 93-222306      930816
DOCUMENT TYPE:           Patent
LANGUAGE:                Japanese
OTHER SOURCE(S):         MARPAT 124:31150

Alternate strategy: Combine the terms with the (s) operator, which requires the two terms to be in the same sentence, for a more precise search.

=> s (photolysis or photochem?) (s) (carbanion? or org? anion?)
         63932 PHOTOLYSIS
        102807 PHOTOCHEM?
          6737 CARBANION?
        803352 ORG?
        205747 ANION?
          2821 ORG? ANION? (ORG?(W)ANION?)
L4          79 (PHOTOLYSIS OR PHOTOCHEM?) (S) 
               (CARBANION? OR ORG? ANION?)

Displays answer 2 of set L4 in indented bibliographic format

=> d L4 ibib 2

L4   ANSWER 2 OF 79  CA  COPYRIGHT 1996 ACS

ACCESSION NUMBER: 123:111323  CA
TITLE:            Reactivity of 1-iodoadamantane with carbanions  
                  by the SRN 1 mechanism
AUTHOR(S):        Rossi, Roberto A.; Pierini, Adriana B.; Borosky, 
                  Gabriela L.
CORPORATE SOURCE: Fac. Cienc. Quim., Univ. Nac. Cordoba, 
                  Cordoba, 61-5016, Argent.
SOURCE:           J. Chem. Soc., Perkin Trans. 2 (1994), (12), 
                  2577-81  CODEN:   JCPKBH; ISSN: 0300-9580
DOCUMENT TYPE:    Journal
LANGUAGE:         English
OTHER SOURCE(S):  CJRSC

Log off in one step

=> log y