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TITLE AND SUBTITLE:
Novel Route to Transition Metal Isothiocyanate Complexes Using Metal Powders and Thiourea
AUTHOR(S):
Harris, Jerry, D.; Eckles, William, E.; Hepp, Aloysius, F.; Duraj, Stan, A.; Hehemann, David, G.; Fanwick, Phillip, E.; Richardson, John
REPORT DATE:
2003-07-xx
FUNDING NUMBERS:
WU-755-A4-01-00
PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration John H. Glenn Research Center at Lewis Field Cleveland, Ohio 44135-3191
PERFORMING ORGANIZATION REPORT NUMBER:
E-13573
SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES):
National Aeronautics and Space Administration Washington, DC 20546-0001
REPORT TYPE AND DATES COVERED:
Technical Paper
SPONSORING/MONITORING AGENCY REPORT NUMBER:
NASA/TP-2003-211890
SUPPLEMENTARY NOTES:
Jerry D. Harris, Cleveland State University, Cleveland, Ohio 44115, and NASA Resident Research Associate at Glenn Research Center; William E. Eckles, Stan A. Duraj, and David G. Hehemann, Cleveland State University, Cleveland, Ohio 44115; Aloysius F. Hepp, NASA Glenn Research Center; Phillip E. Fanwick, Purdue University, West Lafayette, Indiana 47907; and John Richardson, University of Louisville, Louisville, Kentucky 40292. Responsible person, Aloysius F. Hepp, organization code 5410, 216-433-3835.
ABSTRACT:
A new synthetic route to isothiocyanate-containing materials is presented. Eight isothiocyanate-4-methylpyridine (g-picoline) compounds were prepared by refluxing metal powders (Mn, Fe, Co, Ni, and Cu) with thiourea in γ-picoline: compound 1—(Hpic)2[Mn(NCS)4(pic)2]•2pic, compound 2—(Hpic)2[Fe(NCS)4(pic)2]•2pic, compound 3—[Fe(NCS)2(pic)4]•pic, compound 4—[Co(NCS)2(pic)4]•pic, compound 6—[Ni(NCS)2(pic)4], compound 7—[Cu(NCS)2(pic)4]•2/3pic•1/3H2O, compound 8—(Hpic)[Cu(NCS)3(pic)2]•pic, and compound 9—[Cu(NCS)(pic)2]x (where pic = γ-picoline). Compound 5—[Co(NCS)2(pic)4]—was prepared by refluxing the metal powder with ammonium thiocyanate in γ-picoline. With the exception of compound 5, the isothiocyanate ligand was generated in situ by the isomerization of thiourea to NH4+SCN- at reflux temperatures. The complexes were characterized by x-ray crystallography. Compounds 1, 2, and 8 are the first isothiocyanate-4-methylpyridine anionic compounds ever prepared and structurally characterized. Compounds 1 and 2 are isostructural with four equatorially bound isothiocyanate ligands and two axially bound g-picoline molecules. Compound 8 is a five-coordinate copper(II) molecule with a distorted square-pyramidal geometry. Coordinated picoline and two isothiocyanates form the basal plane and the remaining isothiocyanate is bound at the apex. Structural data are presented for all compounds.
SUBJECT TERMS:
Thiocyanate; Isothiocyanate; Methylpyridine; Picoline; Crystal structure; Inorganic chemistry; Synthesis (chemistry); Coordination; Solar cells
NUMBER OF PAGES:
28
PDF AVAILABLE FROM URL:
2003/TP-2003-211890.pdf ( 1325 KB )
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