1,2,3-Dithiazolyl and 1,2,35-Dithiadiazolyl Radicals as Spin-Bearing ...

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Compound Name: 4-(2′-pyrimidyl)-1,2,3,5-diselenadiazolyl MW: 277.0 g/mol Synthesis and Structure: black blocks Appearance: Lit. and/or notebook # and page: DM06-36 p53 DM06-38 p56 First made on date: Jan 19, 2010 Made by: Dan J. MacDonald Experimental Data: Solid triphenylantimony (2.0622 g, 5.8408 mmol) was added to a 128 slurry of [pymDSDA + ][Cl − ] (3.5902 g, 11.489 mmol) in 100 mL of acetonitrile and refluxed for 1.5 h. The resulting black powder was filtered and washed with 3 × 20 mL of acetonitrile and dried in vacuo. Crude yield: 2.9619 g (94% based on [pymDSDA + ][Cl − ]). Crystals suitable for X-ray crystallography were obtained by dynamic vacuum sublimation (10 −2 Torr) at 110 °C. The solution X-band EPR spectrum (CH 2 Cl 2 , 295 K) consists of one broad, featureless absorption (spectral signal width of ca. 150 G), with g = 2.0382, consistent with similar DSDA radical species. In the solid state, the magnetic susceptibility measurements reveal that the title compound is diamagnetic as expected on the basis of the strongly dimerized structure described. .FTIR (KBr): 3122(w), 3058(w), 3028(w), 3018(w), 2977(w), 2964(w), 1736(w), 1557(s), 1435(w), 1418(s), 1345(m), 1270(w), 1256(w), 1226(w), 1180(m), 1106(w), 989(w), 968(w), 893(w), 877(w), 825(m), 798(w), 736(s), 723(s), 646(s), 632(s), 469(w), 426(w), 416(w). EA Anal. Calcd for C5H3N4Se2: C, 21.68; H, 1.09; N, 20.22. Found: C, 21.86; H, 1.31; N, 20.05 185
Crystallography P 2 1 /c a = 9.1678, b = 10.2767, c = 7.7130 α = 90.00, β = 101.622, γ = 90.00 Volume = 711.78 Z = 2 CV: The cyclic voltammetry of the title compound in CH 3 CN (4 mM analyte; 0.18 M [ n Bu 4 N][PF 6 ] electrolyte; the ferrocene/ferrocenium couple at E 1/2 = 0.40 V vs SCE as the internal standard12) reveals a reversible oxidative process E 1/2 = 0.79 V vs SCE (ΔE pp = 120 mV) and a reductive process with poor chemical reversibility 149(cathodic peak potential E pc = −0.76 V vs SCE; anodic peak potential 150E pa = −0.59 V vs SCE). 186
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1,2,3-Dithiazolyl and 1,2,35-Dithia
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an individual binuclear coordinatio
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weren’t sure about something our
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2.1 General........................
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5.3 Reverse oDTANQ.................
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LIST OF FIGURES AND SCHEMES Figure
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Figure 2-12. Magnetic susceptibilit
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GLOSSARY OF ABBREVIATIONS ° Degree
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K k k B LMCT ls LUMO Kelvin Exchang
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LIST OF STRUCTURES I-1 I-2 I-3 I-4
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I-16a I-16b I-16c I-16d I-16e I-16f
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I-22 I-23 I-24 I-25 exo I-26 endo x
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I-34 I-35 II-3 II-4 II-1 xxv
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III-2 III-1 III-3 III-4 III-5 III-6
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V-7 V-8 V-9 V-10 V-11 V-12 V-13 V-1
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Chapter 1 - General Introduction 1.
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linear relationship shown in Figure
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A plot of χT vs. T is an important
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examination of phenyl methylene. In
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different atomic nuclei. Qualitativ
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3) 14 and a variety of thiazyl base
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with one another with an energy bar
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magnetic properties and undergoes a
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heteroatoms which could facilitate
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Figure 1-5. Qualitative molecular o
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temperature. 64 This was a very imp
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dimerization and therefore a quench
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e enough to overcome the energetica
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eaches the lower end of the investi
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DTDAs has been to exploit the rearr
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1.3.4 1,2,3-Dithiazolyl Radicals (I
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aromatic ring not only protects the
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is quite similar to the spin-polari
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compound there are many competing m
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a b c d e Figure 1-16. a) Nonorthog
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would result in non-orthogonal over
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platinum center as well as the phos
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substantial amount of unpaired elec
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I-28 I-29 I-30 The metals manganese
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gave a combination of 2 mononuclear
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changes related to geometric, chemi
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Finally, the last chapter reviews t
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(23) Rajca, A. Chem. Rev. 1994, 94,
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(53) Azuma, N.; Tsutsui, K.; Miura,
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(79) Decken, A.; Cameron, T. S.; Pa
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(102) Herz, R.; Leopold Cassella &
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(128) Aliaga-Alcalde, N., 2003. (12
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Chapter 2 - Structural and Magnetic
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2.2.2 pymDSDA Coordination Complexe
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2.2.3 DTDA Coordination Complexes o
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indicators tend to be very weak str
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In Figure 2-1a, the nickel complex
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2.2.3 Cyclic Voltametry The cyclic
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propensity for intermolecular Se-N
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dimerization motif. One possible ex
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the bridging ligand such that the D
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contacts into four different intera
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e acting as a closed-shell, S = 0,
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2.3.4 [Zn(hfac) 2 ] 2·pymDTDA (II-
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ancillary ligands and the nearly oc
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single molecular unit. Upon closer
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across the entire temperature regim
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2.5 Conclusions and Future Work It
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therefore chain formation. However
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The work presented in this chapter
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736(s), 723(s), 646(s), 632(s), 469
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(0.2023 g, 1.104 mmol) in 30 mL of
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(6) Chattoraj, S. C.; Cupka Jr, A.
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Chapter 3 - 5-oxo-5H-naphtho[1,2-d]
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triethylammonium chloride which was
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3.3.2 Mass Spectrometry A sample of
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3.3.4 X-ray Crystallography Crystal
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a 2-fold screw axis across half of
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number of electrons that this compo
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often generated in situ although wa
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similar to compounds II-1 and II-2,
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3.6 Experimental General All reacti
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Chapter 4 - The Polymorphism of Tri
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4.3 Discussion Prior to the discove
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(derived from angles ranging from 4
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a b c Figure 4-2. Packing diagrams
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Page 165 and 166: Chapter 5 5.1 Overview There are se
Page 167 and 168: success and so a Herz ring closure
Page 169 and 170: did not immediately precipitate, bu
Page 171 and 172: Figure 5-2 shows the IR spectra for
Page 173 and 174: comparison of the infrared data obt
Page 175 and 176: discussed in section 5.2.2. As the
Page 177 and 178: ing was formed. One of the nitrogen
Page 179 and 180: equired to obtain a decent agreemen
Page 181 and 182: Considerations have been put toward
Page 183 and 184: chelation pocket is similar to that
Page 185 and 186: the mixture was filtered to remove
Page 187 and 188: good spectroscopic handle for this
Page 189 and 190: spectrum from about 1900 to 400 cm
Page 191 and 192: doublets of triplets associated wit
Page 193 and 194: adical, followed by the closed-shel
Page 195 and 196: completely dry after being under va
Page 197 and 198: changed substantially after the tra
Page 199 and 200: The reaction to produce V-15 was qu
Page 201 and 202: the proton two carbons away next to
Page 203 and 204: which is parallel to the mean plane
Page 205 and 206: of the 1,2,3-DTA rings could act as
Page 207 and 208: mixture was refluxed for 20 h yield
Page 209 and 210: the heat source was removed and the
Page 211 and 212: 1085(w), 1059(w), 1008(w), 917(w),
Page 213: ___________________________________
Page 217 and 218: Compound Name: 4-(2′-pyrimidyl)-1
Page 219 and 220: Compound Name: [μ-4-(2′-pyrimidy
Page 221 and 222: Magnetometry 192
Page 223 and 224: Crystallography P-1 a = 8.9576, b =
Page 225 and 226: Compound Name: [μ-4-(2′-pyrimidy
Page 227 and 228: Magnetometry: 198
Page 229 and 230: Crystallography: P2 1 /n a = 19.884
Page 231 and 232: Compound Name: 5-oxo-5H-naphtho[1,2
Page 233 and 234: 204
Page 235 and 236: 206
Page 237 and 238: MS (EI + ): 208
Page 239 and 240: Compound Name: 5-chloro-1H-[1,2,5]t
Page 241 and 242: Compound Name: 3-nitro-1,2-naphthaq
Page 243 and 244: Compound Name: 3,4-dioxo-3,4-dihydr
Page 245 and 246: Compound Name: 4,5-dioxo-4,5-dihydr
Page 247 and 248: Compound Name: 6,6′-dinitro-1,1
Page 249 and 250: 220
Page 251: 222
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1,2,3-Dithiazolyl and 1,2,35-Dithiadiazolyl Radicals as Spin-Bearing ...

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