Acta Crystallographica Section C

Crystal Structure Communications

Volume 40, Part 7 (July 1984)

research papers
short communications

research papers

inorganic compounds

Acta Cryst. (1984). C40, 1111-1113 [doi:10.1107/S0108270184006995]

Structure of ammonium calcium phosphate heptahydrate, Ca(NH₄)PO₄.7H₂O

S. Takagi, M. Mathew and W. E. Brown

Acta Cryst. (1984). C40, 1114-1116 [doi:10.1107/S0108270184007009]

Structure determination on a twinned crystal of cesium pentaborate tetrahydrate, Cs[B₅O₆(OH)₄].2H₂O

H. Behm

Acta Cryst. (1984). C40, 1117-1119 [doi:10.1107/S0108270184007010]

Structures of 21 new polytypes of cadmium iodide

B. Palosz and S. Gierlotka

Acta Cryst. (1984). C40, 1120-1121 [doi:10.1107/S0108270184007022]

Lanthanum(III) chlorite trihydrate, La(ClO₂)₃.3H₂O: a redetermination

C. Castellani Bisi

Acta Cryst. (1984). C40, 1121-1124 [doi:10.1107/S0108270184007034]

The deuterium-atom positions in deuterated molybdic acid, MoO₃.2D₂O, by powder neutron diffraction

S. Crouch-Baker and P. G. Dickens

Acta Cryst. (1984). C40, 1124-1127 [doi:10.1107/S0108270184007046]

The structure of barium aluminate, Ba₀.₇₅Al₁₁O₁₇.₂₅

F. P. F. van Berkel, H. W. Zandbergen, G. C. Verschoor and D. J. W. IJdo

Acta Cryst. (1984). C40, 1127-1131 [doi:10.1107/S0108270184007058]

Hexagonal Y₁₃Pd₄₀Sn₃₁, a new structure type containing intergrown CaCu₅- and MnCu₂Al-type derived structure segments

K. Cenzual and E. Parthé

metal-organic compounds

Acta Cryst. (1984). C40, 1131-1135 [doi:10.1107/S010827018400706X]

Structures of copper(II) complexes with N,N'-bis(-carbamoylethyl)ethylenediamine and its deprotonated form, [Cu(NO₃)(C₈H₁₈N₄O₂)(H₂O)].NO₃.H₂Oand [Cu(C₈H₁₆N₄O₂)(H₂O)].H₂O

T.-J. Lee, T.-H. Lu, S.-H. Liu, C.-S. Chung and T.-Y. Lee

Acta Cryst. (1984). C40, 1135-1137 [doi:10.1107/S0108270184007071]

Structure of [2,2'-(1,4,10,13-tetraoxa-7,16-diaza-7,16-cyclooctadecylene)dipropionato]copper(II), [Cu(C₁₈H₃₂N₂O₈)]

J. W. Krajewski, P. Gluzinski, Z. Urbanczyk-Lipkowska and M. Dobler

Acta Cryst. (1984). C40, 1137-1139 [doi:10.1107/S0108270184007083]

Di(4,4',5,5'-tetramethyl-2,2'-bi-1,3-diselenolyliden)ium perrhenate, C₂₀H₂₄Se₈⁺.ReO₄^-, (TMTSF)₂ReO₄. Detailed superstructure at 120 K

G. Rindorf, H. Soling and N. Thorup

Acta Cryst. (1984). C40, 1140-1141 [doi:10.1107/S0108270184007095]

Di--aqua-tetrakis[-(methanol)-(methanol)sodium] octamolybdate, [Na₄(CH₄O)₈(H₂O)₂][Mo₈O₂₆]

E. M. McCarron III and R. L. Harlow

Acta Cryst. (1984). C40, 1142-1145 [doi:10.1107/S0108270184007101]

Structure of tetrakis[bis(2-hydroxyethyl)dithiocarbamato]tellurium(IV), C₂₀H₄₀N₄O₈S₈Te

G. C. Rout, M. Seshasayee, G. Aravamudan and K. Radha

Acta Cryst. (1984). C40, 1145-1147 [doi:10.1107/S0108270184007113]

Structure of trans-diaquabis(ethylenediamine)nickel(II) bis(trichloroacetate), [Ni(C₂H₈N₂)₂(H₂O)₂](C₂Cl₃O₂)₂

S. García-Granda and F. Gómez-Beltrán

Acta Cryst. (1984). C40, 1147-1150 [doi:10.1107/S0108270184007125]

Structural studies of tetraaquabis(saccharinato-N)zinc(II) dihydrate, [Zn(C₇H₄NO₃S)₂(H₂O)₄].2H₂O, and tetraaquabis(saccharinato-N)cadmium(II) dihydrate, [Cd(C₇H₄NO₃S)₂(H₂O)₄\].2H₂O

S. Z. Haider, K. M. A. Malik, S. Das and M. B. Hursthouse

Acta Cryst. (1984). C40, 1150-1152 [doi:10.1107/S0108270184007137]

Dimeric N-tert-butyl(chloroarsine)imine, C₈H₁₈As₂Cl₂N₂

R. Bohra, H. W. Roesky, M. Noltemeyer and G. M. Sheldrick

Acta Cryst. (1984). C40, 1152-1154 [doi:10.1107/S0108270184007149]

Tetraaquabis(hydrogen maleato)nickel(II), [Ni(C₄H₃O₄)₂(H₂O)₄]

M. P. Gupta, H. J. Geise and A. T. H. Lenstra

Acta Cryst. (1984). C40, 1155-1156 [doi:10.1107/S0108270184007150]

Structure of trans-bis(2,3-butanedione dioximato-N,N')(imidazole-N³)methylcobalt(III), C₁₂H₂₁CoN₆O₄

V. Pattabhi, M. Nethaji, E. J. Gabe, F. L. Lee and Y. Le Page

Acta Cryst. (1984). C40, 1157-1159 [doi:10.1107/S0108270184007162]

Lithium hydrogen adipate, Li⁺.C₆H₉O₄^-

X. He and B. M. Craven

Acta Cryst. (1984). C40, 1160-1161 [doi:10.1107/S0108270184007174]

Structure of (⁵-cyclopentadienyl)(⁶-tetraphenylborato)iron, [Fe(C₅H₅){B(C₆H₅)₄}]

R. D. Rogers and D. C. Hrncir

Acta Cryst. (1984). C40, 1161-1164 [doi:10.1107/S0108270184007186]

Tris(2,6-dimethyl-4H-pyran-4-one)dinitratocadmium(II), [Cd(NO₃)₂(C₇H₈O₂)₃]

A. Banerjee, C. J. Brown, P. C. Jain and P. Gautam

Acta Cryst. (1984). C40, 1164-1169 [doi:10.1107/S0108270184007198]

Structures of cis-dichloro(methanol)(salicylaldehyde benzoylhydrazonato)iron(III), [FeCl₂(C₁₄H₁₁N₂O₂)(CH₄O)], and chloro(salicylaldehyde benzoylhydrazonato)copper(II) monohydrate,[CuCl(C₁₄H₁₁N₂O₂)].H₂O

A. A. Aruffo, T. B. Murphy, D. K. Johnson, N. J. Rose and V. Schomaker

Acta Cryst. (1984). C40, 1169-1172 [doi:10.1107/S0108270184007204]

Structure of tetrakis(2,6-dimethylphenyl isocyanide)rhodium(I) tetraphenylborate ethanol solvate, [Rh(C₉H₉N)₄][B(C₆H₅)₄].C₂H₆O

T. V. Ashworth, D. C. Liles, H. E. Oosthuizen and E. Singleton

Acta Cryst. (1984). C40, 1172-1175 [doi:10.1107/S0108270184007216]

Structures of bis(1,5-dithiacyclooctan-3-ol-O,S,S')nickel(II) diperchlorate dimethanol, [Ni(C₆H₁₂OS₂)₂](ClO₄)₂.2CH₄O, and bis(1,5-dithiacyclooctan-3-ol-O,S,S')iron(II) diperchlorate, [Fe(C₆H₁₂OS₂)₂](ClO₄)₂

M. M. Olmstead, W. K. Musker and R. M. Kessler

Acta Cryst. (1984). C40, 1175-1177 [doi:10.1107/S0108270184007228]

Structure of catena-tetraaqua-di-₃-(N-salicylidene-DL-glutamato)-tricopper(II) heptahydrate [Cu₃(C₁₂H₁₀NO₅)₂(H₂O)₄].7H₂O

K. Korhonen, R. Hämäläinen and U. Turpeinen

Acta Cryst. (1984). C40, 1178-1181 [doi:10.1107/S010827018400723X]

Structural studies on metal complexes of chiral cyclen. V. Chloro[(2RS,5RS,8RS,11SR)-1,4,7,10-tetrabenzyl-2,5,8,11-tetraethyl-1,4,7,10-tetraazacyclododecane]copper(II) dichlorocuprate(I) ethanol solvate, [CuCl(C₄₄H₆₀N₄)][CuCl₂].3C₂H₆O

S. Tsuboyama, K. Kobayashi, T. Sakurai and K. Tsuboyama

Acta Cryst. (1984). C40, 1181-1183 [doi:10.1107/S0108270184007241]

Structure du tricarbonyl(hydroxyméthyl-2 phényl-2 propanol)chrome(III), [Cr(CO)₃(C₁₀H₁₄O₂)]

F. Abraham, G. Nowogrocki, J. Brocard, J. Lebibi et C. Brémard

Acta Cryst. (1984). C40, 1183-1186 [doi:10.1107/S0108270184007253]

The barium 3,5-dinitrobenzoate benzo-15-crown-5 complex, Ba²⁺.2C₇H₃N₂O₆^-.C₁₄H₂₀O₅

D. L. Ward, A. I. Popov and N. S. Poonia

Acta Cryst. (1984). C40, 1186-1188 [doi:10.1107/S0108270184007265]

The structure of tetrakis(acetonitrile)tetrachlorouranium(IV), [UCl₄(C₂H₃N)₄]

F. A. Cotton, D. O. Marler and W. Schwotzer

organic compounds

Acta Cryst. (1984). C40, 1188-1190 [doi:10.1107/S0108270184007277]

Structure of (+)-(7S,11S)-11-hydroxy-10-methylbicyclo[5.3.1]dec-1(10)-en-7-ylmethyl (+)-10-camphorsulfonate, C₂₃H₃₆O₅S

L. Lebioda, J. A. Marshall and K. E. Flynn

Acta Cryst. (1984). C40, 1191-1193 [doi:10.1107/S0108270184007289]

Structure of the thermodynamic benzenethiol 1,4 adduct of the cembranolide crassin alcohol, C₂₆H₃₆O₄S

L. Lebioda, J. A. Marshall and M. J. Coghlan

Acta Cryst. (1984). C40, 1193-1196 [doi:10.1107/S0108270184007290]

Structure of 3-hydroxyimino-2-butanone thiosemicarbazone, a tridentate N-S ligand, C₅H₁₀N₄OS

A. K. Nandi, S. Chaudhuri, S. K. Mazumdar and S. Ghosh

Acta Cryst. (1984). C40, 1197-1198 [doi:10.1107/S0108270184007307]

Structure of 1-[ethyl(phenyl)phosphinyl]-1-phenylethanol, C₁₆H₁₉O₂P

Z. Galdecki, P. Grochulski, B. Luciak, Z. Wawrzak and W. L. Duax

Acta Cryst. (1984). C40, 1199-1200 [doi:10.1107/S0108270184007319]

Acetone O-[2-(1-hydroxy-3-phenyl-2-triazeno)-2-propyl]oxime, C₁₂H₁₈N₄O₂

K. R. Acharya, A. M. Shaikh and Nizamuddin

Acta Cryst. (1984). C40, 1201-1204 [doi:10.1107/S0108270184007320]

Conformation and structure of -tert-butyl N-(N-tert-butoxycarbonyl-O⁵-benzyl--L-glutamyl)-O⁵-benzyl-L-glutamate, C₃₃H₄₄N₂O₉

D. S. Eggleston and D. J. Hodgson

Acta Cryst. (1984). C40, 1204-1205 [doi:10.1107/S0108270184007332]

Triméthyl-1,3,6 diphényl-4,5 oxa-9 diaza-2,7 tricyclo[3.3.1.0²,⁴]nonanone-8, C₂₁H₂₂N₂O₂

R. Faure, H. Loiseleur, G. Alvernhe et A. Laurent

Acta Cryst. (1984). C40, 1206-1207 [doi:10.1107/S0108270184007344]

O-Isopropylidène-1,2 O-méthyl-3 O-[tétra-O-acétyl-2,3,4,6 désoxy-1 D-glucopyrannosylidène-1-(1S)]-5,6 -D-glucofurannose, C₂₄H₃₄O₁₅

J.-P. Praly, G. Descotes, R. Faure et H. Loiseleur

Acta Cryst. (1984). C40, 1208-1210 [doi:10.1107/S0108270184007356]

cis-Hexaméthyl-1,3,4b,6,8,9b dihydro-4b,9b benzofuro[3,2-b]benzofuranne, C₂₀H₂₂O₂

R. Mercier, M. Ramah, B. Laude, R. Faure et H. Loiseleur

Acta Cryst. (1984). C40, 1210-1211 [doi:10.1107/S0108270184007368]

Fluorene, C₁₃H₁₀

V. K. Belsky, V. E. Zavodnik and V. M. Vozzhennikov

Acta Cryst. (1984). C40, 1211-1214 [doi:10.1107/S010827018400737X]

A polarized, twisted, ethylene: structure of 3,3-bis(methylthio)-2-nitro-2-propene-1-nitrile, C₅H₆N₂O₂S₂

N. U. Kamath and K. Venkatesan

Acta Cryst. (1984). C40, 1214-1217 [doi:10.1107/S0108270184007381]

Structure of 3,5,3'-triiodothyronamine bis(salicylato)borate (1:1) salt, T₃AM.BSA, C₁₄H₁₃I₃NO₂⁺.C₁₄H₈BO₆^-

V. Cody

Acta Cryst. (1984). C40, 1217-1219 [doi:10.1107/S0108270184007393]

N-{(1R,5S,7R*)-6-Oxobicyclo[3.2.0]hept-2-en-7-yl}phthalimide, C₁₅H₁₁NO₃

B. Sheldrick, D. Akrigg, M. I. Page and D. Agathocleous

Acta Cryst. (1984). C40, 1219-1220 [doi:10.1107/S010827018400740X]

Configuration absolue du p-bromobenzoyl-1 perhydroindolecarboxylate-2 d'éthyle-(2S,3aS,7aS) hydraté, C₁₈H₂₂BrNO₃.H₂O

F. Robert, Y. Jeannin, M. Vincent et M. Laubie

Acta Cryst. (1984). C40, 1221-1223 [doi:10.1107/S0108270184007411]

Structure du p-toluènesulfonate de dithia-1,4 spiro[4.5]décyle-8, C₁₅H₂₀O₃S₃

A. Dubourg, P. Iratçabal, M. F. Grenier-Loustalot, R. Roques, J.-P. Declercq et G. Germain

Acta Cryst. (1984). C40, 1224-1226 [doi:10.1107/S0108270184007423]

Structure and absolute configuration of (R)-N-chloroacetyl-(+)-3,3,3-trifluoro-2-aminoisobutyric acid, C₆H₇ClF₃NO₃

J. W. Keller and C. S. Day

Acta Cryst. (1984). C40, 1226-1228 [doi:10.1107/S0108270184007435]

Structure of 3-(p-ethoxyphenyl)sydnone (1), C₁₀H₁₀N₂O₃, and 3-(p-tolyl)sydnone (2), C₉H₈N₂O₂

Y. Wang, P. L. Lee and M.-H. Yeh

Acta Cryst. (1984). C40, 1229-1231 [doi:10.1107/S0108270184007447]

Structure of 4,4a-dihydro-9-methyl-4a-[2,2,2-trifluoro-1-(2-hydroxy-9-methylcarbazol-3-yl)ethyl]carbazol-2(3H)-one nitromethane solvate, C₂₈H₂₃F₃N₂O₂.CH₃NO₂

K. Prout and J. M. Marín

Acta Cryst. (1984). C40, 1231-1233 [doi:10.1107/S0108270184007459]

Covalently linked purine-pyrimidine analogs. The structure of 7-(5-hydroxy-3-oxo-2,3-dihydro-4-pyrazolyl)theophylline monohydrate, C₁₀H₁₀N₆O₄.H₂O

E. Gavuzzo, F. Mazza, A. Carotti and G. Casini

Acta Cryst. (1984). C40, 1234-1236 [doi:10.1107/S0108270184007460]

Structure of 9-aminobicyclo[3.3.1]nonane-9-carboxylic acid dihydrate, C₁₀H₁₇NO₂.2H₂O

P. Narasimhan and K. K. Chacko

Acta Cryst. (1984). C40, 1236-1239 [doi:10.1107/S0108270184007472]

Structures of a hydrocarbon C₅₈H₄₀ and its photo-oxidation products. II. 4',5'-Dihydro-1',2,2',3,4,4,4'-heptaphenylspiro[cyclopent-2-ene-5,5'-naphtho[2,1-b]furan]-1-one, C₅₈H₄₀O₂

C. T. Grainger

Acta Cryst. (1984). C40, 1239-1242 [doi:10.1107/S0108270184007484]

Thiocarbonohydrazide dihydrochloride hemihydrate, CH₈N₄S²⁺.2Cl^-.0.5H₂O

M. Lanfranchi, A. M. Manotti Lanfredi, M. A. Pellinghelli and A. Tiripicchio

Acta Cryst. (1984). C40, 1242-1245 [doi:10.1107/S0108270184007496]

Structure of 5-azatricyclo[4.3.1.0³,⁸]decan-4-one hemihydrate, C₉H₁₃NO.1/2H₂O

P. Kálal, K. Bláha and V. Langer

Acta Cryst. (1984). C40, 1245-1248 [doi:10.1107/S0108270184007502]

Structure of (Z)-N-acetyl-,-didehydrophenylalanyl-L-alanine hydrate, C₁₄H₁₆N₂O₄.1/3H₂O

V. Busetti, D. Ajò and M. Casarin

Acta Cryst. (1984). C40, 1248-1250 [doi:10.1107/S0108270184007514]

Structure of L-tyrosyl-L-valine monohydrate, C₁₄H₂₀N₂O₄.H₂O

B. Ramakrishnan, T. P. Seshadri and M. A. Viswamitra

Acta Cryst. (1984). C40, 1250-1252 [doi:10.1107/S0108270184007526]

Conformation and structure of L-valyl-L-glutamic acid, C₁₀H₁₈N₂O₅

D. S. Eggleston

Acta Cryst. (1984). C40, 1253-1255 [doi:10.1107/S0108270184007538]

trans-Decalin-1,4-dione, C₁₀H₁₄O₂

S. Ariel and J. Trotter

Acta Cryst. (1984). C40, 1255-1260 [doi:10.1107/S010827018400754X]

The disordered structures of 1,4-dibromo-2,5-diethyl-3,6-dimethylbenzene (BEMB1) and 1,3-dibromo-2,5-diethyl-4,6-dimethylbenzene (BEMB2), C₁₂H₁₆Br₂

R. A. Wood, T. R. Welberry and M. Puza

Acta Cryst. (1984). C40, 1260-1262 [doi:10.1107/S0108270184007551]

Structure of difluoro(methylamino)phosphine, CH₄F₂NP, at 97 K

A. J. Blake, E. A. V. Ebsworth and A. J. Welch

Acta Cryst. (1984). C40, 1263-1264 [doi:10.1107/S0108270184007563]

2-Methyl-5,5-diphenyl-1,3,2⁵-dioxaphosphorinane 2-sulfide, C₁₆H₁₇O₂PS

P. Van Nuffel, C. Van Alsenoy, A. T. H. Lenstra, H. J. Geise and G. R. Van den Berg

Acta Cryst. (1984). C40, 1265-1267 [doi:10.1107/S0108270184007575]

Structure of 3-(2,6-dichlorobenzylidenehydrazino)-1,2,4-triazol-4-amine: nebidrazine (FLA-136), C₉H₈Cl₂N₆

A. Carpy, M. Saux and M. Montagut

Acta Cryst. (1984). C40, 1267-1269 [doi:10.1107/S0108270184007587]

Structure of 2-[(1-ethyl-2-imidazolyl)methyl]-2,3-dihydro-1,4-benzodioxin hydrochloride monohydrate: RS-21361, C₁₄H₁₆N₂O₂.HCl.H₂O

A. Carpy, M. Montagut and J.-M. Léger

Acta Cryst. (1984). C40, 1269-1271 [doi:10.1107/S0108270184007599]

Structure du (méthyl-1 nitro-4 imidazolyl-5)thio-3 1H-triazole-1,2,4, C₆H₆N₆O₂S

L. Dupont, O. Dideberg et J. Cl. Jamoulle

Acta Cryst. (1984). C40, 1271-1273 [doi:10.1107/S0108270184007605]

The structure of 2,2'-diphenyl-1,1'-(1,3-phenylene)diethanedione, C₂₂H₁₄O₄

A. Syed, E. D. Stevens and C. L. Klein

Acta Cryst. (1984). C40, 1273-1276 [doi:10.1107/S0108270184007617]

The structure of 2,2'-diphenyl-1,1'-(1,4-phenylene)diethanedione, C₂₂H₁₄O₄

A. Syed and E. D. Stevens

Acta Cryst. (1984). C40, 1276-1278 [doi:10.1107/S0108270184007629]

Structure of 3-acetyl-5-(-methylbenzylidene)-2,4-oxolanedione, C₁₄H₁₂O₄

Mazhar-ul-Haque, P. Pollet, J. Ahmed and W. Horne

Acta Cryst. (1984). C40, 1278-1281 [doi:10.1107/S0108270184007630]

Structures comparées de deux pyrroles: le diphényl-3,5 pyrroledicarboxylate-1,2 de diéthyle, C₂₂H₂₁NO₄ (1) et le (chloro-2 phényl)-3 phényl-5 pyrroledicarboxylate-1,2 de diéthyle,C₂₂H₂₀ClNO₄ (2)

A. Laarif, F. Théobald, M. Birouk et J.-F. Robert

Acta Cryst. (1984). C40, 1281-1283 [doi:10.1107/S0108270184007642]

1-Isopropyl-10-methylphenothiazine, C₁₆H₁₇NS

S. S. C. Chu, S. V. L. Narayana and R. D. Rosenstein

Acta Cryst. (1984). C40, 1284-1286 [doi:10.1107/S0108270184007654]

Structure of 4-deoxy-4-fluoro--D-fructopyranose, C₆H₁₁FO₅

J. Podlahová and J. Loub

Acta Cryst. (1984). C40, 1286-1288 [doi:10.1107/S0108270184007666]

(R,S)-2,3-Dihydroxy-2,3-dimethylbutanedioic acid monohydrate (meso-dimethyltartaric acid), C₆H₁₀O₆.H₂O

E. N. Duesler, M. Mondragon and R. E. Tapscott

Acta Cryst. (1984). C40, 1289-1290 [doi:10.1107/S0108270184007678]

Struktur von Cuneancarbonsäureamid (Pentacyclo[4.3.0.0²,⁴.0³,⁸.0⁵,⁷]nonan-4-carbonsäureamid), C₁₀H₁₁NO

R. Fröhlich

Acta Cryst. (1984). C40, 1291-1294 [doi:10.1107/S010827018400768X]

Bis{1a,8b-dihydro(1,1-²H₂)-2H-benzo[a]cyclopropa[c]cyclohepten-2-one}hydrogen(I) hexachloroantimonate, [H(C₁₂H₈D₂O)₂][SbCl₆]

R. F. Childs, R. Faggiani, C. J. L. Lock and A. Varadarajan

Acta Cryst. (1984). C40, 1294-1295 [doi:10.1107/S0108270184007691]

1-(p-Chlorophenyl)biguanide hydrochloride, C₈H₁₁ClN₅⁺.Cl^-

C. J. Brown and L. Sengier

Acta Cryst. (1984). C40, 1296-1298 [doi:10.1107/S0108270184007708]

The molecular structures of chiral and meso pentacyclic bis(amino)alcohols related to amitriptyline: (I) 5,7-bis(3-dimethylaminopropyl)-12,13,15,16-tetrahydrotribenzo[1,2-d:1',2'-a':1'',2''-d']dicycloheptene-5,7-diol, C₃₄H₄₄N₂O₂, and (II) 5,13-bis(3-dimethylaminopropyl)-7,8,15,16-tetrahydrotribenzo[1,2-d:1',2'-a:4',5'-a':1'',2''-d']dicycloheptene-5,13-diol, C₃₄H₄₄N₂O₂

C. Horsburgh, P. F. Lindley, F. Stride, Y. Asscher and I. Agranat

short communications

Acta Cryst. (1984). C40, 1299 [doi:10.1107/S010827018400771X]

Erratum to Kinetics of dehydration of single crystals of copper formate tetrahydrate by Fichte and Flanagan

R. F. Baggio

Acta Cryst. (1984). C40, 1299-1300 [doi:10.1107/S0108270184007721]