14 research outputs found
Peraturan Bersama Menteri Agama dan Menteri dalam Negeri Nomor 08 dan 09 Tahun 2006 Tentang Pendirian Rumah Ibadat (Kajian dalam Perspektif Hak Asasi Manusia )
Pundamental 1945 Constitution as the rule has been set explicitly for religious freedom in the run by followers, who belong to one human rights has, but in reality the persecution of religious life and often inevitable. Between religious persecution can come from various directions such as harassing each other, mutual intimidate(violence) and that most often occurs between religious persecution that is prihal establishment synagogue. Therefore, in terms of the establishment of the synagogue there must be government intervention to regulate it, if in this case given the freedom and without any clear rules, the sectarian conflict will not be able to avoid. One step from the government to avoid conflict in the establishment of the synagogue is to be issued the Joint Decree of the Minister of Religious Affairs and the Minister of Home Affairs Number 08 and Number 09 Year 2006 About the Construction of Houses of Worship that aims to create harmony and peace between religious and have certainty Strong law
Synthesis, Structural and Magnetic Properties of Ternary Complexes of (Me<sub>4</sub>P<sup>+</sup>)·{[Fe(I)Pc(−2)]<sup>−</sup>}·Triptycene and (Me<sub>4</sub>P<sup>+</sup>)·{[Fe(I)Pc(−2)]<sup>−</sup>}·(<i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′‑Tetrabenzyl‑<i>p</i>‑phenylenediamine)<sub>0.5</sub> with Iron(I) Phthalocyanine Anions
Ternary complexes
of (Me<sub>4</sub>P<sup>+</sup>)·{[FeÂ(I)ÂPcÂ(−2)]<sup>−</sup>}·TPC (<b>1</b>) and (Me<sub>4</sub>P<sup>+</sup>)·{[FeÂ(I)ÂPcÂ(−2)]<sup>−</sup>}·(TBPDA)<sub>0.5</sub> (<b>2</b>) containing ironÂ(I) phthalocyanine anions,
tetramethylphosphonium cations (Me<sub>4</sub>P<sup>+</sup>), and
neutral structure-forming triptycene (TPC) or <i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-tetrabenzyl-<i>p</i>-phenylenediamine (TBPDA) molecules have been obtained
as single crystals. In contrast to previously studied ionic compounds
with monomeric [(FeÂ(I)ÂPc(−2)]<sup>−</sup> anions, the
anions form coordination {[FeÂ(I)ÂPc(−2)]<sup>−</sup>}<sub>2</sub> dimers both in <b>1</b> and <b>2</b>, in which
a nitrogen atom of one phthalocyanine anion weakly coordinates to
the ironÂ(I) atom of neighboring [FeÂ(I)ÂPc(−2)]<sup>−</sup>. The Fe···N distances in the dimers are 3.08(1) and
3.12(1) Ã… in <b>1</b> at 280 K and 2.986(5) (100 K) and
3.011(5) Ã… (180 K) in <b>2</b>. The {[FeÂ(I)ÂPc(−2)]<sup>−</sup>}<sub>2</sub> dimers are packed in the layers in <b>1</b> arranged parallel to the <i>ac</i> plane and in
isolated chains in <b>2</b> arranged along the <i>a</i> axis. Extended Hückel based calculation of intermolecular
overlap integrals showed stronger and weaker π–π
interactions within and between phthalocyanine dimers, respectively,
both in <b>1</b> and <b>2</b>. EPR signals of both complexes
manifest two components. An major low-field asymmetric component is
attributed to the FeÂ(I) atoms with the d<sup>7</sup> configuration.
An origin minor narrow signal with <i>g</i>-factor close
to the free-electron value (<i>g</i> = 2.0018–2.0035)
is assigned to partial electron density transfer from the ironÂ(I)
center to the phthalocyanine macrocycle and the formation of the [FeÂ(II)ÂPc(−3)]<sup>−</sup> species. Effective magnetic moments of the complexes
of 1.69 (<b>1</b>) and 1.76 μ<sub>B</sub> (<b>2</b>) correspond to the contribution of about one <i>S</i> = <sup>1</sup>/<sub>2</sub> spin per formula unit in accordance with low-spin
state of [FeÂ(I)ÂPc(−2)]<sup>−</sup>. Negative Weiss temperatures
of −7.6 K (<b>1</b>) and −13 K (<b>2</b>) in the 30–300 K range indicate antiferromagnetic interaction
of spins in the phthalocyanine dimers. The multicomponent approach
was previously proposed for the anionic fullerene complex formation.
It also seems very promising to design and synthesize anionic phthalocyanine
complexes with one- and two-dimensional macrocycle arrangements
Spin Crossover in Anionic Cobalt-Bridged Fullerene (Bu<sub>4</sub>N<sup>+</sup>){Co(Ph<sub>3</sub>P)}<sub>2</sub>(μ<sub>2</sub>‑Cl<sup>–</sup>)(μ<sub>2</sub>‑η<sup>2</sup>,η<sup>2</sup>‑C<sub>60</sub>)<sub>2</sub> Dimers
A spin crossover
phenomena is observed in an anionic (Bu<sub>4</sub>N<sup>+</sup>)Â{CoÂ(Ph<sub>3</sub>P)}<sub>2</sub>(μ<sub>2</sub>-Cl<sup>–</sup>)Â(μ<sub>2</sub>-η<sup>2</sup>,η<sup>2</sup>-C<sub>60</sub>)<sub>2</sub>·2C<sub>6</sub>H<sub>14</sub> (<b>1</b>) complex
in which two cobalt atoms bridge two fullerene
molecules to form a dimer. The dimer has a triplet ground state with
two weakly coupling Co<sup>0</sup> atoms (<i>S</i> = 1/2).
The spin transition realized above 150 K is accompanied by a cobalt-to-fullerene
charge transfer that forms a quintet excited state with a high spin
Co<sup>I</sup> (<i>S</i> = 1) and C<sub>60</sub><sup>•–</sup> (<i>S</i> = 1/2)
Spin Crossover in Anionic Cobalt-Bridged Fullerene (Bu<sub>4</sub>N<sup>+</sup>){Co(Ph<sub>3</sub>P)}<sub>2</sub>(μ<sub>2</sub>‑Cl<sup>–</sup>)(μ<sub>2</sub>‑η<sup>2</sup>,η<sup>2</sup>‑C<sub>60</sub>)<sub>2</sub> Dimers
A spin crossover
phenomena is observed in an anionic (Bu<sub>4</sub>N<sup>+</sup>)Â{CoÂ(Ph<sub>3</sub>P)}<sub>2</sub>(μ<sub>2</sub>-Cl<sup>–</sup>)Â(μ<sub>2</sub>-η<sup>2</sup>,η<sup>2</sup>-C<sub>60</sub>)<sub>2</sub>·2C<sub>6</sub>H<sub>14</sub> (<b>1</b>) complex
in which two cobalt atoms bridge two fullerene
molecules to form a dimer. The dimer has a triplet ground state with
two weakly coupling Co<sup>0</sup> atoms (<i>S</i> = 1/2).
The spin transition realized above 150 K is accompanied by a cobalt-to-fullerene
charge transfer that forms a quintet excited state with a high spin
Co<sup>I</sup> (<i>S</i> = 1) and C<sub>60</sub><sup>•–</sup> (<i>S</i> = 1/2)
Magnetic and Optical Properties of Layered (Me<sub>4</sub>P<sup>+</sup>)[M<sup>IV</sup>O(Pc<sup>•3–</sup>)]<sup>•–</sup>(TPC)<sub>0.5</sub>·C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> Salts (M = Ti and V) Composed of π‑Stacking Dimers of Titanyl and Vanadyl Phthalocyanine Radical Anions
Two isostructural
salts with radical anions of titanyl and vanadyl
phthalocyanines (Me<sub>4</sub>P<sup>+</sup>)Â[M<sup>IV</sup>OÂ(Pc<sup>•3–</sup>)]<sup>•–</sup>Â(TPC)<sub>0.5</sub>·C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (M
= Ti (<b>1</b>), V (<b>2</b>)), where TPC is triptycene,
were obtained. These salts contain phthalocyanine layers composed
of the {[M<sup>IV</sup>OÂ(Pc<sup>•3–</sup>)]<sup>•–</sup>}<sub>2</sub> dimers with strong π–π intradimer
interaction. The reduction of metal phthalocyanines was centered on
the Pc macrocycles providing the appearance of new bands in the near
infrared range and a blue shift of Q- and Soret bands. That results
in the alternation of shorter and longer C–N<sub>imine</sub> bonds in Pc<sup>•3–</sup>. Only one <i>S</i> = 1/2 spin is delocalized over Pc<sup>•3–</sup> in <b>1</b> providing a χ<sub>M</sub><i>T</i> value
of 0.364 emu K mol<sup>–1</sup> at 300 K. Salt <b>1</b> showed antiferromagnetic behavior approximated by the Heisenberg
model for isolated pairs of antiferromagnetically interacting spins
with exchange interaction of <i>J</i>/<i>k</i><sub>B</sub> = −123.0 K. The χ<sub>M</sub><i>T</i> value for <b>2</b> is equal to 0.617 emu K mol<sup>–1</sup> at 300 K to show the contribution of two <i>S</i> = 1/2
spins localized on V<sup>IV</sup> and delocalized over Pc<sup>•3–</sup>. Magnetic behavior of <b>2</b> is described by the Heisenberg
model for a four-spin system with strong intermolecular coupling between
Pc<sup>•3–</sup> in {[V<sup>IV</sup>OÂ(Pc<sup>•3–</sup>)]<sup>•–</sup>}<sub>2</sub> (<i>J</i><sub>inter</sub>/<i>k</i><sub>B</sub> = −105.0 K) and
weaker intramolecular coupling between the V<sup>IV</sup> and Pc<sup>•3–</sup> (<i>J</i><sub>intra</sub>/<i>k</i><sub>B</sub> = −15.2 K)
Coordination Complexes of Pentamethylcyclopentadienyl Iridium(III) Diiodide with Tin(II) Phthalocyanine and Pentamethylcyclopentadienyl Iridium(II) Halide with Fullerene C<sub>60</sub><sup>–</sup> Anions
Synthetic
approaches to iridium complexes of metal phthalocyanines
(Pc) and fullerene anions have been developed to give three types
of complexes. The compoundÂ{(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}·2C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (<b>1</b>) (Cp* is pentamethylcyclopentadienyl) is the first
crystalline complex of a metal phthalocyanine in which an iridiumÂ(III)
atom is bonded to the central tinÂ(II) atom of Pc via a Sn–Ir
bond length of 2.58 Ã…. In (TBA<sup>+</sup>)Â(C<sub>60</sub><sup>•–</sup>)Â{(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}·0.5C<sub>6</sub>H<sub>14</sub> (<b>2</b>), the {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)} units cocrystallize with (TBA<sup>+</sup>)Â(C<sub>60</sub><sup>•–</sup>) to form double chains of C<sub>60</sub><sup>•–</sup> anions and closely packed chains of {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}. Interactions
between the fullerene and phthalocyanine subsystems are realized through
π–π stacking of the Cp* groups of {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)} and the C<sub>60</sub><sup>•–</sup> pentagons. Furthermore, the spins of
the C<sub>60</sub><sup>•–</sup> are strongly antiferromagnetically
coupled in the chains with an exchange interaction <i>J</i>/<i>k</i><sub>B</sub> = −31 K. Anionic (TBA<sup>+</sup>)Â{(Cp*Ir<sup>II</sup>Cl)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)}·1.34C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (<b>3</b>) and (TBA<sup>+</sup>)Â{(Cp*Ir<sup>II</sup>I)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)}·1.3C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub>·0.2C<sub>6</sub>H<sub>14</sub> (<b>4</b>) are the first transition metal complexes containing η<sup>2</sup>-bonded C<sub>60</sub><sup>–</sup> anions, with the
Cp*Ir<sup>II</sup>Cl and Cp*Ir<sup>II</sup>I units η<sup>2</sup>-coordinated to the 6–6 bonds of C<sub>60</sub><sup>–</sup>. Magnetic measurements indicate diamagnetism of the {(Cp*Ir<sup>II</sup>Cl)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)} and {(Cp*Ir<sup>II</sup>I)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)} anions due to the formation of a coordination bond
between two initially paramagnetic Cp*Ir<sup>II</sup>Cl or Cp*Ir<sup>II</sup>I groups and C<sub>60</sub><sup>•–</sup> units.
DFT calculations support a diamagnetic singlet ground state of <b>4</b>, in which the singlet–triplet energy gap is greater
than 0.8 eV. DFT calculations also indicate that the C<sub>60</sub> molecules are negatively charged
Coordination Complexes of Pentamethylcyclopentadienyl Iridium(III) Diiodide with Tin(II) Phthalocyanine and Pentamethylcyclopentadienyl Iridium(II) Halide with Fullerene C<sub>60</sub><sup>–</sup> Anions
Synthetic
approaches to iridium complexes of metal phthalocyanines
(Pc) and fullerene anions have been developed to give three types
of complexes. The compoundÂ{(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}·2C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (<b>1</b>) (Cp* is pentamethylcyclopentadienyl) is the first
crystalline complex of a metal phthalocyanine in which an iridiumÂ(III)
atom is bonded to the central tinÂ(II) atom of Pc via a Sn–Ir
bond length of 2.58 Ã…. In (TBA<sup>+</sup>)Â(C<sub>60</sub><sup>•–</sup>)Â{(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}·0.5C<sub>6</sub>H<sub>14</sub> (<b>2</b>), the {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)} units cocrystallize with (TBA<sup>+</sup>)Â(C<sub>60</sub><sup>•–</sup>) to form double chains of C<sub>60</sub><sup>•–</sup> anions and closely packed chains of {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}. Interactions
between the fullerene and phthalocyanine subsystems are realized through
π–π stacking of the Cp* groups of {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)} and the C<sub>60</sub><sup>•–</sup> pentagons. Furthermore, the spins of
the C<sub>60</sub><sup>•–</sup> are strongly antiferromagnetically
coupled in the chains with an exchange interaction <i>J</i>/<i>k</i><sub>B</sub> = −31 K. Anionic (TBA<sup>+</sup>)Â{(Cp*Ir<sup>II</sup>Cl)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)}·1.34C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (<b>3</b>) and (TBA<sup>+</sup>)Â{(Cp*Ir<sup>II</sup>I)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)}·1.3C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub>·0.2C<sub>6</sub>H<sub>14</sub> (<b>4</b>) are the first transition metal complexes containing η<sup>2</sup>-bonded C<sub>60</sub><sup>–</sup> anions, with the
Cp*Ir<sup>II</sup>Cl and Cp*Ir<sup>II</sup>I units η<sup>2</sup>-coordinated to the 6–6 bonds of C<sub>60</sub><sup>–</sup>. Magnetic measurements indicate diamagnetism of the {(Cp*Ir<sup>II</sup>Cl)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)} and {(Cp*Ir<sup>II</sup>I)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)} anions due to the formation of a coordination bond
between two initially paramagnetic Cp*Ir<sup>II</sup>Cl or Cp*Ir<sup>II</sup>I groups and C<sub>60</sub><sup>•–</sup> units.
DFT calculations support a diamagnetic singlet ground state of <b>4</b>, in which the singlet–triplet energy gap is greater
than 0.8 eV. DFT calculations also indicate that the C<sub>60</sub> molecules are negatively charged
Formation of {Co(dppe)}<sub>2</sub>{μ<sub>2</sub>‑η<sup>2</sup>:η<sup>2</sup>‑η<sup>2</sup>:η<sup>2</sup>‑[(C<sub>60</sub>)<sub>2</sub>]} Dimers Bonded by Single C–C Bonds and Bridging η<sup>2</sup>‑Coordinated Cobalt Atoms
Coordination of two bridging cobalt
atoms to fullerenes by the η<sup>2</sup> type in {CoÂ(dppe)}<sub>2</sub>{μ<sub>2</sub>-η<sup>2</sup>:η<sup>2</sup>-η<sup>2</sup>:η<sup>2</sup>-[(C<sub>60</sub>)<sub>2</sub>]}·3C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> [<b>1</b>; dppe = 1,2-bisÂ(diphenylphosphino)Âethane] triggers fullerene dimerization
with the formation of two intercage C–C bonds of 1.571(4) Å
length. Coordination-induced fullerene dimerization opens a path to
the design of fullerene structures bonded by both covalent C–C
bonds and η<sup>2</sup>-coordination-bridged metal atoms
Interligand Charge Transfer in a Complex of Deprotonated <i>cis</i>-Indigo Dianions and Tin(II) Phthalocyanine Radical Anions with Cp*Ir<sup>III</sup>
A diamagnetic complex,
{(<i>cis</i>-indigo-<i>N</i>,<i>N</i>)<sup>2–</sup>(Cp*Ir<sup>III</sup>)} (<b>1</b>), in
which deprotonated <i>cis</i>-indigo dianions coordinate
an iridium center through two nitrogen atoms was obtained. By employment
of the ability of the iridium center in <b>1</b> to coordinate
an additional ligand, the complex [(Bu<sub>4</sub>N<sup>+</sup>)<sub>2</sub>{[Sn<sup>II</sup>(Pc<sup>•3–</sup>)]Â(<i>cis</i>-indigo-<i>N</i>,<i>N</i>)<sup>2–</sup>Cp*Ir<sup>III</sup>}<sup>•–</sup><sub>2</sub>·0.5Â(H<sub>2</sub>Indigo)·2.5C<sub>6</sub>H<sub>4</sub>C<sub>l2</sub> (<b>2</b>), which has two functional ligands coordinating an Ir<sup>III</sup> center, was obtained. This complex has a magnetic moment
of 1.71 μ<sub>B</sub> at 300 K, in accordance with an <i>S</i> = 1/2 spin state. The spin density is mainly delocalized
over the Pc<sup>•3–</sup> macrocycle and partially on
(<i>cis</i>-indigo-<i>N</i>,<i>N</i>)<sup>2–</sup>. Due to an effective π–π
interaction, a thermally activated charge transfer from [Sn<sup>II</sup>(Pc<sup>•3–</sup>)]<sup>•–</sup> to (<i>cis</i>-indigo-<i>N</i>,<i>N</i>)<sup>2–</sup> is observed, with an estimated Gibbs energy (−Δ<i>G</i>°) of 9.27 ± 0.18 kJ/mol. The deprotonation of
indigo associated with the coordination of Ir<sup>III</sup> by the
indigo releases H<sup>+</sup> ions, which protonate noncoordinating
indigo molecules to produce leuco <i>cis</i>-indigo (H<sub>2</sub>Indigo). One H<sub>2</sub>indigo links two (<i>cis</i>-indigo-<i>N</i>,<i>N</i>)<sup>2–</sup> dianions in <b>2</b> to produce strong N–H···OC
and O–H···OC hydrogen-bonding interactions
Coordination Complexes of Pentamethylcyclopentadienyl Iridium(III) Diiodide with Tin(II) Phthalocyanine and Pentamethylcyclopentadienyl Iridium(II) Halide with Fullerene C<sub>60</sub><sup>–</sup> Anions
Synthetic
approaches to iridium complexes of metal phthalocyanines
(Pc) and fullerene anions have been developed to give three types
of complexes. The compoundÂ{(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}·2C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (<b>1</b>) (Cp* is pentamethylcyclopentadienyl) is the first
crystalline complex of a metal phthalocyanine in which an iridiumÂ(III)
atom is bonded to the central tinÂ(II) atom of Pc via a Sn–Ir
bond length of 2.58 Ã…. In (TBA<sup>+</sup>)Â(C<sub>60</sub><sup>•–</sup>)Â{(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}·0.5C<sub>6</sub>H<sub>14</sub> (<b>2</b>), the {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)} units cocrystallize with (TBA<sup>+</sup>)Â(C<sub>60</sub><sup>•–</sup>) to form double chains of C<sub>60</sub><sup>•–</sup> anions and closely packed chains of {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)}. Interactions
between the fullerene and phthalocyanine subsystems are realized through
π–π stacking of the Cp* groups of {(Cp*Ir<sup>III</sup>I<sub>2</sub>)ÂSn<sup>II</sup>PcÂ(2−)} and the C<sub>60</sub><sup>•–</sup> pentagons. Furthermore, the spins of
the C<sub>60</sub><sup>•–</sup> are strongly antiferromagnetically
coupled in the chains with an exchange interaction <i>J</i>/<i>k</i><sub>B</sub> = −31 K. Anionic (TBA<sup>+</sup>)Â{(Cp*Ir<sup>II</sup>Cl)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)}·1.34C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub> (<b>3</b>) and (TBA<sup>+</sup>)Â{(Cp*Ir<sup>II</sup>I)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)}·1.3C<sub>6</sub>H<sub>4</sub>Cl<sub>2</sub>·0.2C<sub>6</sub>H<sub>14</sub> (<b>4</b>) are the first transition metal complexes containing η<sup>2</sup>-bonded C<sub>60</sub><sup>–</sup> anions, with the
Cp*Ir<sup>II</sup>Cl and Cp*Ir<sup>II</sup>I units η<sup>2</sup>-coordinated to the 6–6 bonds of C<sub>60</sub><sup>–</sup>. Magnetic measurements indicate diamagnetism of the {(Cp*Ir<sup>II</sup>Cl)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)} and {(Cp*Ir<sup>II</sup>I)Â(η<sup>2</sup>-C<sub>60</sub><sup>–</sup>)} anions due to the formation of a coordination bond
between two initially paramagnetic Cp*Ir<sup>II</sup>Cl or Cp*Ir<sup>II</sup>I groups and C<sub>60</sub><sup>•–</sup> units.
DFT calculations support a diamagnetic singlet ground state of <b>4</b>, in which the singlet–triplet energy gap is greater
than 0.8 eV. DFT calculations also indicate that the C<sub>60</sub> molecules are negatively charged