Synthesis, Structural Characterization, Magnetic Behavior, and Single Crystal EPR Spectra
of Three New One-Dimensional Manganese Azido Systems with FM, Alternating FM-AF,
and AF Coupling
Morsy A. M. Abu-Youssef
Albert Escuer
Dante Gatteschi
Mohamed A. S. Goher
Franz A. Mautner
Ramon Vicente
10.1021/ic990656x.s001
https://acs.figshare.com/articles/dataset/Synthesis_Structural_Characterization_Magnetic_Behavior_and_Single_Crystal_EPR_Spectra_of_Three_New_One-Dimensional_Manganese_Azido_Systems_with_FM_Alternating_FM-AF_and_AF_Coupling/3625710
Reaction of sodium azide with manganese(II) and pyridine derivatives such as 2-bzpy, 3-bzpy, and 3,5lut (2-benzoylpyridine, 3-benzoylpyridine, and 3,5-dimethylpyridine, respectively) led to the one-dimensional systems
<i>cis</i>-[Mn(2-bzpy)(N<sub>3</sub>)<sub>2</sub>]<i><sub>n</sub></i> (<b>1</b>), <i>trans</i>-[Mn(3-Bzpy)<sub>2</sub>(N<sub>3</sub>)<sub>2</sub>]<i><sub>n</sub></i> (<b>2</b>), and <i>cis-</i>[Mn(3,5lut)<sub>2</sub>(N<sub>3</sub>)<sub>2</sub>]<i><sub>n</sub></i> (<b>3</b>). Compound <b>1</b> crystallizes
in the <i>P</i>2<sub>1</sub>/<i>n</i> group: <i>a</i> = 14.413(4) Å, <i>b</i> = 16.157(4) Å, <i>c</i> = 18.478(5) Å, and <i>Z</i> = 12. Compound <b>2</b> crystallizes
in the <i>C</i>2/<i>c</i> group: <i>a</i> = 14.179(5) Å, <i>b</i> = 9.698(4) Å, <i>c</i> = 34.351(12) Å, and <i>Z</i> = 8. Compound <b>3</b> crystallizes
in the <i>P</i>2<sub>1</sub>/<i>n</i> group: <i>a</i> = 13.552(6) Å, <i>b</i> = 7.730(3) Å, <i>c</i> = 16.554(6) Å, and <i>Z</i> = 4. Structural determination
shows a chain with double μ<sub>1,1</sub> azido bridges for <b>1</b>, an alternating system with double μ<sub>1,1</sub> and μ<sub>1,3</sub> azido bridges
for <b>2</b>, and finally a chain with double μ<sub>1,3</sub> azido bridges for <b>3</b>. Susceptibility data show ferromagnetic coupling
for <b>1</b>, antiferromagnetic coupling for <b>3</b>, and alternating ferro−antiferromagnetic interactions for <b>2</b>. EPR data
measured on powdered samples and single crystals show the ideal Heisenberg narrowing angular dependence for
the three kinds of coupled systems and an increasing dipolar broadening mechanism in the order <b>3</b> < <b>2</b> < <b>1</b>
according to the decreasing Mn···Mn intrachain distances.
1999-11-23 00:00:00
ci
4. Structural determination
N 3
azido
Mn
bzpy
benzoylpyridine
FM
Susceptibility data show
AF
Single Crystal EPR Spectra
Compound 1 crystallizes