55 research outputs found
Carbon Origami via an Alumina-Assisted Cyclodehydrofluorination Strategy
The synthesis of pristine nonâplanar nanographenes (NGs) via a cyclodehydrofluorination strategy is reported and the creation of highly strained systems via aluminaâassisted CâF bond activation is shown. Steric hindrance could execute an alternative coupling program leading to rare octagon formation offering access to elusive nonâclassical NGs. The combination of two alternative ways of folding could lead to the formation of various 3D NG objects, resembling the Japanese art of origami. The power of the presented âorigamiâ approach is proved by the assembly of 12 challenging nanographenes that are Ïâisoelectronic to planar hexabenzocoronene but forced out of planarity
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
New Isolated-Pentagon-Rule Isomer of C<sub>92</sub> Isolated as Trifluoromethyl and Chlorido Derivatives: C<sub>92</sub>(38)(CF<sub>3</sub>)<sub>14/16</sub> and C<sub>92</sub>(38)Cl<sub>20/22</sub>
High-temperature trifluoromethylation
and chlorination of the C<sub>92</sub> fraction followed by single-crystal
X-ray diffraction with the use of synchrotron radiation resulted in
the structure determination of C<sub>92</sub>(38)Â(CF<sub>3</sub>)<sub>14</sub>, five isomers of C<sub>92</sub>(38)Â(CF<sub>3</sub>)<sub>16</sub>, and C<sub>92</sub>(38)ÂCl<sub>20/22</sub>. Their addition patterns are stabilized by
the formation of isolated Cî»C bonds and aromatic substructures.
According to quantum-chemical calculations, the newly detected <i>C</i><sub>1</sub>âC<sub>92</sub>(38) belongs to the most
stable isomers of C<sub>92</sub>
Carbon Origami via an AluminaâAssisted Cyclodehydrofluorination Strategy
The synthesis of pristine nonâplanar nanographenes (NGs) via a cyclodehydrofluorination strategy is reported and the creation of highly strained systems via aluminaâassisted CâF bond activation is shown. Steric hindrance could execute an alternative coupling program leading to rare octagon formation offering access to elusive nonâclassical NGs. The combination of two alternative ways of folding could lead to the formation of various 3D NG objects, resembling the Japanese art of origami. The power of the presented âorigamiâ approach is proved by the assembly of 12 challenging nanographenes that are Ïâisoelectronic to planar hexabenzocoronene but forced out of planarity
New Isolated-Pentagon-Rule Isomers of Fullerene C<sub>98</sub> Captured as Chloro Derivatives
Fullerene C<sub>98</sub> possesses 259 isomers obeying the isolated pentagon rule (IPR),
from which two, nos. 116 and 248, have been confirmed earlier as chloro
derivatives. High-temperature chlorination of C<sub>98</sub>-containing
mixtures afforded crystals of several chloro derivatives, and their
structure elucidation by X-ray crystallography revealed the presence
of new isomers, nos. 107, 109, and 120, in the fullerene soot. Evidence
for an isomer of no. 111 is also presented. In addition, a new chloride
of the known isomer 248 has been isolated and structurally studied.
The chlorination patterns of the chlorides are discussed in terms
of the formation of isolated Cî»C bonds and aromatic substructures
on the fullerene cages
New Giant Fullerenes Identified as Chloro Derivatives: Isolated-Pentagon-Rule C<sub>108</sub>(1771)Cl<sub>12</sub> and C<sub>106</sub>(1155)Cl<sub>24</sub> as well as Nonclassical C<sub>104</sub>Cl<sub>24</sub>
High
temperature chlorination of HPLC fractions of higher fullerenes followed
by single crystal X-ray diffraction with the use of synchrotron radiation
resulted in the structure determination of IPR C<sub>106</sub>(1155)ÂCl<sub>24</sub> and IPR C<sub>108</sub>(1771)ÂCl<sub>12</sub>. C<sub>106</sub>(1155)ÂCl<sub>24</sub> is cocrystallized with C<sub>104</sub>Cl<sub>24</sub>, a chloride of the nonclassical isomer of C<sub>104</sub>. The moderately stable isomer C<sub>106</sub>(1155) and the most
stable C<sub>108</sub>(1771) represent so far the largest pristine
fullerenes with known cages
Skeletal Transformation of a Classical Fullerene C<sub>88</sub> into a Nonclassical Fullerene Chloride C<sub>84</sub>Cl<sub>30</sub> Bearing Quaternary Sequentially Fused Pentagons
A classical
fullerene is composed of hexagons and pentagons only,
and its stability is generally determined by the Isolated-Pentagon-Rule
(IPR). Herein, high-temperature chlorination of a mixture containing
a classical IPR-obeying fullerene C<sub>88</sub> resulted in isolation
and X-ray crystallographic characterization of non-IPR, nonclassical
(<i>NC</i>) fullerene chloride C<sub>84</sub>(<i>NC</i>2)ÂCl<sub>30</sub> (<b>1</b>) containing two heptagons. The
carbon cage in C<sub>84</sub>(<i>NC</i>2)ÂCl<sub>30</sub> contains 14 pentagons, 12 of which form two pairs of fused pentagons
and two groups of quaternary sequentially fused pentagons, which have
never been observed in reported carbon cages. All 30 Cl atoms form
an unprecedented single chain of ortho attachments on the C<sub>84</sub> cage. A reconstruction of the pathway of the chlorination-promoted
skeletal transformation revealed that the previously unknown IPR isomer
C<sub>88</sub>(3) is converted into <b>1</b> by two losses of
C<sub>2</sub> fragments followed by two StoneâWales rearrangements,
resulting in the formation of very stable chloride with rather short
CâCl bonds
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