Synthesis, structure, and properties of Ca2ZnN2

Chern, Ming–Yau; DiSalvo, Francis J.

doi:10.1016/0022-4596(90)90250-2

Cited by 42 publications

(16 citation statements)

References 9 publications

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“…Man zahlt zunachst die Elektronen im Polyanion; das sind hier 26: das Nickelatom bringt 10 Elektronen ein, die beiden Kohlenstoffatome je 4 und schlieDlich tragt das Anion auch noch 8 formale Ladungen. Als nachstes zeichnet man unter Berucksichtigung der Oktettregel fur die Kohlenstoffatome mogliche Lewis-Formeln fur das Polyanion: A n m e r k u n g b e i d e r K o r r e k t u r : ThzNiCz ist isotyp mit Na2Hg02 [35], NazPdHa [36] und CazZnNZ [37]. Die Anionen […”

Section: Rontgenographische Untersuchungenunclassified

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th₃Ni₅C₅ und Th₂NiC₂

Moss

Jeitschko

1991

Zeitschrift anorg allge chemie

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structure structure (solids and liquids) D 2000 -012Crystal Structure and Properties of the Thorium Nickel Carbides Th3Ni5C5 and Th2NiC2.-The title carbides are prepared by arc melting of mixtures of the elements. Th3Ni5C5 (I) crystallizes in a new structure type ( orthorhombic, Cmcm, Z = 4) and Th2NiC2 (II) has the tetragonal U2IrC2-type structure (I4/mmm, Z = 2). (I) contains infinite 2D Ni-C polyanions, while (II) contains isolated NiC2 units. In (I), two C2-pairs (C-C distance: 137 pm) and one isolated C atom exist, while no C-C bonds are observed in (II). This is in agreement with the observed hydrolysis product distribution: 57% C2H4 and C2H6 and 40% CH4 for (I) and 85% CH4 for (II).

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Section: Rontgenographische Untersuchungenunclassified

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th₃Ni₅C₅ und Th₂NiC₂

Moss

Jeitschko

1991

Zeitschrift anorg allge chemie

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“…Li 2 CeN 2 is an isotype of Li 2 [ZrN 2 ] and Li 2 [HfN 2 ] [38]. For Ca x Ti IV 1Ϫx N a disordered rocksalt-type crystal structure was indicated [39], similar as for the phases (Ca,Th)(N,O) and (Sr,Th)(N,O) [40]. In the system La 1Ϫx Ca x N 1Ϫx/3 [21] the charge balance is attained by defects in the anionic substructure, while CaCeN 2 apparently has only a very narrow homogeneity range.…”

Section: Discussionmentioning

confidence: 99%

New Ternary Alkaline Earth Metal Cerium(IV) Nitrides: CaCeN2 and SrCeN2Dedicated to Professor Welf Bronger on the Occasion of his 70th Birthday

Prots

Niewa

Schnelle

et al. 2002

Z. anorg. allg. Chem.

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CaCeN 2 and SrCeN 2 were prepared by reactions of Li 2 CeN 2 with Ca 3 N 2 or Sr 2 N in a nitrogen atmosphere at 1020 K. According to measurements of the magnetic susceptibilities both compounds contain Ce IV . The crystal structures were determined by full-profile Rietveld refinements of the X-ray powder diffraction patterns. CaCeN 2 crystallizes in a rocksalt-type structure with disordered Ca and Ce (space group Fm3m, a ϭ 499.21(1) pm, R profile ϭ 0.061, R Bragg ϭ 0.034). The low temperature modification of SrCeN 2 crystallizes in the α-NaFeO 2 type structure (space group Neue Ternäre Erdalkalimetall-Cer(IV)-Nitride: CaCeN 2 und SrCeN 2 Inhaltsübersicht. CaCeN 2 und SrCeN 2 wurden durch Reaktion von Li 2 CeN 2 mit Ca 3 N 2 bzw. Sr 2 N in Stickstoffatmosphäre bei 1020 K hergestellt. Wie Messungen der magnetischen Suszeptibilitäten zeigen, enthalten beide Verbindungen Ce IV . Die Kristallstrukturen wurden mit der Rietveld-Methode anhand der Röntgenpulverdiffraktogramme verfeinert. CaCeN 2 kristallisiert im NaCl-Strukturtyp mit statistischer Verteilung von Ca und Ce (Raumgruppe Fm3m; a ϭ 499,21(1) pm; R profile ϭ 0,061; R Bragg ϭ 0,034). Die R3m, a ϭ 362.18(4) pm, c ϭ 1795.8(2) pm, R profile ϭ 0.085, R Bragg ϭ 0.031). At elevated temperatures an order-disorder phase transition leads to HT-SrCeN 2 (space group Fm3m, a ϭ 515.01(2) pm, quenched from 1273 K) with a cubic unit cell and complete disorder of Sr and Ce.Tieftemperaturmodifikation LT-SrCeN 2 kristallisiert im α-NaFeO 2 Strukturtyp (Raumgruppe R3m; a ϭ 362,18(4) pm; c ϭ 1795,8(2) pm; R profile ϭ 0,085; R Bragg ϭ 0,031). Bei höherer Temperatur führt eine Ordnungs-Unordnungs-Umwandlung zu HT-SrCeN 2 (Raumgruppe Fm3m; a ϭ 515,01(2) pm; abgeschreckt von 1273 K) mit einer kubischen Elementarzelle und vollständiger Unordnung von Sr und Ce auf der Metallposition.

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“…[12] Furthermore, the concept of CO 2 -analogous molecules can also be extended to heavier homologues of the main-group elements as it was shown for several X = Y = X molecules, and multiple bonds are even formed to Group 11 and 12 metals. [13] Recently we have also shown the existence of the highly charged 16 VE species [Sn = Zn=Sn] 6À in the intermetallic compounds Na 6 ZnSn 2 and Na 20 Zn 8 Sn 11 . [14] The three-atomic ions each have a linear structure, whereas the Zintl phase Ba 2 ZnBi 2 is a rare example with a polymeric anion 1 1 [(ZnBi 4/2 ) 4À ], [8] which is isostructural to SiS 2 .…”

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confidence: 96%

“…The K À K distances in compound 1 appear rather short but compare well to the shortest distance those in the neat solid K 4 ZnP 2 with d(KÀK) = 3.73 . [13] The K 6 rings are not planar but exhibit a chairtype conformation. In the center of the K 6 hexagon the Zn1 atom is positioned with the orientation of the linear ZnBi 2 unit almost, but not fully, perpendicular to the mean plane of the K1 atoms and with a tilt angle of 65.63(1)8 with respect to the mean plane.…”

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confidence: 99%

BiZn Bond Formation in Liquid Ammonia Solution: [BiZnBi]⁴⁻, a Linear Polyanion that is Iso(valence)‐electronic to CO₂

et al. 2014

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Reactions of the zinc(I) complex [Zn 2 (Mesnacnac) 2 ] (Mesnacnac = [(2,4,6-Me 3 C 6 H 2 )NC(Me)] 2 CH) with solid K 3 Bi 2 dissolved in liquid ammonia yield crystals of the compound K 4 [ZnBi 2 ]·(NH 3 ) 12 (1), which contains the molecular, linear heteroatomic [Bi À Zn À Bi] 4À polyanion (1 a). This anion represents the first example of a three-atomic molecular ion of metal atoms being iso(valence)-electronic to CO 2 and being synthesized in solution. The analogy of the discrete [BiÀ ZnÀBi] 4À anion and the polymeric 1 1 [(ZnBi 4/2 ) 4À ] unit to monomeric CO 2 and polymeric SiS 2 is rationalized.

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Synthesis, structure, and properties of Ca2ZnN2

Cited by 42 publications

References 9 publications

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th₃Ni₅C₅ und Th₂NiC₂

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th₃Ni₅C₅ und Th₂NiC₂

New Ternary Alkaline Earth Metal Cerium(IV) Nitrides: CaCeN2 and SrCeN2Dedicated to Professor Welf Bronger on the Occasion of his 70th Birthday

BiZn Bond Formation in Liquid Ammonia Solution: [BiZnBi]⁴⁻, a Linear Polyanion that is Iso(valence)‐electronic to CO₂

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Synthesis, structure, and properties of Ca2ZnN2

Cited by 42 publications

References 9 publications

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th3Ni5C5 und Th2NiC2

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th3Ni5C5 und Th2NiC2

New Ternary Alkaline Earth Metal Cerium(IV) Nitrides: CaCeN2 and SrCeN2Dedicated to Professor Welf Bronger on the Occasion of his 70th Birthday

BiZn Bond Formation in Liquid Ammonia Solution: [BiZnBi]4−, a Linear Polyanion that is Iso(valence)‐electronic to CO2

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Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th₃Ni₅C₅ und Th₂NiC₂

Kristallstrukturen und Eigenschaften der Thorium‐Nickel‐Carbide Th₃Ni₅C₅ und Th₂NiC₂

BiZn Bond Formation in Liquid Ammonia Solution: [BiZnBi]⁴⁻, a Linear Polyanion that is Iso(valence)‐electronic to CO₂