| ELENCO DELLE PUBBLICAZIONI DEL PROF. GIANFRANCO CIANI ( parte 2 di 3 ) |
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| ELENCO DELLE PUBBLICAZIONI DEL PROF. GIANFRANCO CIANI ( parte 2 di 3 ) |
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66) |
Synthesis and X-ray characterization of the novel [Rh10S(CO)10(m-CO)12]2- anion; a bicapped
square-antiprismatic cluster containing an interstitial sulphur atom. G. Ciani, L. Garlaschelli, A. Sironi e S. Martinengo. J. C. S. Chem. Commun., (1981) 563. |
67) |
Synthesis of the novel anions [Re3H3(m3-OR)(CO)9]- (R= Et, i-Pr, t-Bu) and X-ray
characterization of [Re3H3(m3-OEt)(CO)9](NEt4). G. Ciani, G. D'Alfonso, M. Freni, P. Romiti e A. Sironi. J. Organomet. Chem., 219 (1981) C23. |
68) |
Synthesis and structural characterization of the anion tri-m-hydridoiodoundecacarbonyl-triangulo-trirhenate(1-). G. Ciani, G. D'Alfonso, M. Freni, P. Romiti e A. Sironi. J. Organomet. Chem., 220 (1981) C11. |
69) |
Synthesis and X-ray characterization of the high-nuclearity [Rh17(m3-CO)3(m-CO)15(CO)12]3- anion containing a tetracapped
twinned cuboctahedral cluster. G. Ciani, A. Magni, A. Sironi e S. Martinengo. J. C. S. Chem. Commun., (1981) 1280. |
70) |
Synthesis of the anions [Re3H3(m-X)(CO)10]- (X=Cl,Br,I) and X-ray
characterization of [Re3H3(m-Cl)(CO)10](NEt4). G. Ciani, G. D'Alfonso, M. Freni, P. Romiti e A. Sironi. J. Organomet. Chem., 226 (1982) C31. |
71) |
A mixed-metal nitrido carbonyl cluster compound. Synthesis and X-ray
structure of the [PtRh10N(m-CO)10(CO)11]3- anion. S. Martinengo, G. Ciani e A. Sironi. J. Amer. Chem. Soc., 104 (1982) 328. |
72) |
Synthesis and structural characterization of tetra-m3-carbonylhexacarbonyltris [bis(diphenylphosphino)methane]-hexarhodium. A. Ceriotti, G. Ciani, L. Garlaschelli, U.Sartorelli e A. Sironi. J. Organomet. Chem., 229 (1982) C9. |
73) |
New carbide clusters in the cobalt sub-group. Part 9. Preparation and
crystallographic characterization of dicarbidododeca-m-carbonyl-dodecacarbonyl-polyhedro-tridecacobaltate(4-)
as its tetrakis(benzyltrimethylammonium) salt [N(CH2Ph)Me3][Co13C2(CO)24].Me2CO. V.G. Albano, D. Braga, P. Chini, G. Ciani e S. Martinengo. J. C. S. Dalton Trans., (1982) 645. |
74) |
Reaction of the unsaturated anion [Re3H4(CO)10]- with mercaptans. Synthesis and
X-ray characterization of the anion [Re3H3(CO)9(m3-SBut)]-. R. Bonfichi, G. Ciani, G. D'Alfonso, P. Romiti e A. Sironi. J. Organomet. Chem., 231 (1982) C35. |
75) |
A high nuclearity carbonyl cluster of rhenium stabilized by an
interstitial carbide; synthesis and X-ray crystal structure of the anion [Re7C(CO)21]3-. G. Ciani, G. D'Alfonso, M. Freni, P. Romiti e A. Sironi. J. C. S. Chem. Commun., (1982) 339. |
76) |
High nuclearity carbonyl clusters of rhodium. Part 3. Crystal and
molecular structure of hexadeca-m-carbonyl-enneacarbonyl-polyhedro-tetradecarhodate(4-)
in its tetraethylammonium salt. G. Ciani, A. Sironi e S. Martinengo. J. C. S. Dalton Trans., (1982) 1099. |
77) |
Reactions of the unsaturated anion [Re3H4(CO)10]- with carboxylic acids and X-ray
characterization of the anions [Re3H3(CO)10(m-O2CR]- (R = H, CF3). T. Beringhelli, G. Ciani, G. D'Alfonso, A. Sironi e M. Freni. J. Organomet. Chem., 233 (1982) C46. |
78) |
High nuclearity carbido carbonyl clusters of rhenium. Synthesis, X-ray
crystal structure, and 13C N.M.R. Study of the anion [Re8C(CO)24]2-. G. Ciani, G. D'Alfonso, M. Freni, P. Romiti e A. Sironi. J. C. S. Chem. Commun., (1982) 705. |
79) |
Synthesis and X-ray structure of the anion [Rh9(m3-CO)3(m-CO)9(CO)7]3- containing a cofacial bioctahedral
rhodium cluster. S. Martinengo, A. Fumagalli, R. Bonfichi, G. Ciani e A. Sironi. J. C. S. Chem. Commun., (1982) 825. |
80) |
Crystal and molecular structure of the anion phosphido-di-m-carbonyl tetradecacarbonyl-hexacobaltate(1-) in its
tetraphenylphosphonium salt. G. Ciani e A. Sironi. J. Organomet. Chem., 241 (1983) 385. |
81) |
Rhodium carbonyl clusters with interstitial nitrogen atoms. Part 1.
Crystal and molecular structure of the bis(triphenylphosphine)iminium salt of the anion
ennea-m-carbonyl-hexacarbonyl-m6-nitrido-polyhedro-hexarhodate(1-). R. Bonfichi, G. Ciani, A. Sironi e S. Martinengo. J. C. S. Dalton Trans., (1983) 253. |
82) |
Synthesis, X-ray crystal structure and 13C NMR study of the anion [Re6(m3-H)2C(CO)18]2-: the first octahedral carbonyl
cluster of rhenium. G. Ciani, G. D'Alfonso, P. Romiti, A. Sironi e M.Freni. J. Organomet. Chem., 244 (1983) C27. |
83) |
Stereochemistry at the chiral ruthenium atom in the reaction of
diastereomeric (h5-C5H5)RuCl[(R)-Ph2PCH(CH3)CH2PPh2] with SnCl2. G. Consiglio, F. Morandini, G. Ciani, A. Sironi e M. Kretschmer. J. Amer. Chem. Soc., 105 (1983) 1391. |
84) |
A new undecametal rhodium carbonyl cluster consisting of three condensed
octahedral units. Synthesis and crystal structure of the [Rh11(CO)23]3- trianion. A. Fumagalli, S. Martinengo, G. Ciani e A. Sironi. J. C. S. Chem. Commun., (1983) 453. |
85) |
The crystal and molecular structure of trans-chlorocarbonylbis
(triphenylphosphine)rhodium(I) in its monoclinic form. A. Ceriotti, G. Ciani e A. Sironi. J. Organomet. Chem., 247 (1983) 345. |
86) |
Stereospecific reactions of chiral chlororuthenium(II) complexes with
Grignard reagents. G. Consiglio, F. Morandini, G. Ciani e A. Sironi. Angew.Chem. Int. Ed. Engl., 22 (1983) 333. |
87) |
Asymmetric hydrogenation catalyzed by aminophosphine-phosphiniterhodium
complexes derived from natural aminoalcohols and X-ray crystal structure of
(1,5-cyclooctadiene)-(S)-N-(diphenylphosphino)-2-diphenylphosphinoxymethylpyrrolidinerhodium(I)
perchlorate. E. Cesarotti, A. Chiesa, G. Ciani e A. Sironi. J. Organomet. Chem., 251 (1983) 79. |
88) |
Rhenium(V) oxide complexes. Crystal and molecular structures of the
compounds trans-ReI2O(OR)(PPh3)2 (R = Et, Me) and of their hydrolysis derivative ReIO2(PPh3)2. G. Ciani, G. D'Alfonso, P. Romiti, A. Sironi e M. Freni. Inorg. Chim. Acta, 72 (1983) 29. |
89) |
Relation between structures and spectroscopic properties of group 2B metal
[M(chelate)X2] complexes (X = Cl, Br, I). Crystal and molecular structure of [H2NCH2(CH3)2CCH2NH2]MX2 complexes (M = Zn, X = Cl, Br; M = Cd, X = Br). F. Cariati, G. Ciani, L. Menabue, G. C. Pellacani, G. Rassu e A. Sironi. Inorg. Chem., 22 (1983) 1897. |
90) |
Interaction of metal ions with humic-like models. Part I. Synthesis,
spectroscopic and structural properties of diaquabis(2,6-dihydroxy benzoato)copper(II) and
hexaaquaM(II) bis(2,6-dihydroxybenzoate) dihydrate (M = Mn, Fe, Co, Ni, Cu and Zn). F. Cariati, L. Erre, G. Micera, A.Panzanelli, G. Ciani e A. Sironi. Inorg. Chim. Acta, 80 (1983) 57. |
91) |
A reactive and versatile trirhenium carbonyl cluster obtained by oxidation
of [Re3(m-H)4(CO)10]-. Synthesis, X-ray characterization
and reactivity of Re3(m-H)3(CO)10(NCMe)2. G. Ciani, A. Sironi, G. D'Alfonso, P. Romiti e M. Freni. J. Organomet. Chem., 254 (1983) C37. |
92) |
Stepwise degradation of the unsaturated cluster tetrakis(m-hydrido) decacarbonyltrirhenate(1-) by reaction with iodine. Crystal and
molecular structures of the tetraethylammonium salts of the new anions bis(m-hydrido)bis(m-iodo)decacarbonyltrirhenate(1-) and
(m-hydrido)bis(m-iodo)hexacarbonyldirhenate(1-). G. Ciani, G. D'Alfonso, P. Romiti, A. Sironi e M. Freni. Inorg. Chem., 22 (1983) 3115. |
93) |
Diastereomeric chiral diphosphine chloro(h5-cyclopentadienyl) ruthenium(II) complexes and the crystal structure of
[(S)RuCl(h5-C5H5)(R)Ph2PCH(Me)CH2PPh2]. F. Morandini, G. Consiglio, B. Straub, G. Ciani e A. Sironi. J. C. S. Dalton Trans., (1983) 2293. |
94) |
High nuclearity Pt-Rh carbonyl clusters. Synthesis and X-ray
characterization of the [Pt2Rh11(m-CO)12(CO)12]3- and [PtRh12(m-CO)12(CO)12]4- anions. A. Fumagalli, S. Martinengo e G. Ciani. J. C. S. Chem. Commun., (1983) 1381. |
95) |
Synthesis and chemical characterization of the new anions [Rh3(m3-E)2(CO)6]- (E = S or Se). Crystal and
molecular structures of [PPh4][Rh3(m3-S)2(CO)6] and [NMe4] [Rh3(m3-Se)2(CO)6]. D. Galli, L. Garlaschelli, G. Ciani, A. Fumagalli, S. Martinengo e A. Sironi. J. C. S. Dalton Trans., (1984) 55. |
96) |
Stereospecific substitution of the chloro-ligand by acetonitrile in the
diastereomeric (h5-C5H5)RuCl[(R)-Ph2PCH(CH3)CH2PPh2] complexes. F. Morandini, G. Consiglio, G. Ciani e A. Sironi. Inorg. Chim. Acta, 82 (1984) l27. |
97) |
Synthesis and absolute configuration of a series of chiral ruthenium
complexes; crystal structure of (R)-[Ru(h5-C5H4R*) (CO)(PPh3)I] (R* = Neomenthyl). E. Cesarotti, A. Chiesa, G. Ciani, A. Sironi, R. Vefghi e C. White. J. C. S. Dalton Trans., (1984) 653. |
98) |
A benzamido bridged rhenium carbonyl cluster produced by attack of OH- on coordinated PhCN. X-ray
characterization of the anion [Re3(m-H)3(CO)10(m-h2-OC(Ph)NH)]-. T. Beringhelli, E. Cesarotti, G. Ciani, G. D'Alfonso e A. Sironi. J. Organomet. Chem., 268 (1984) C18. |
99) |
Synthesis of the carbonyl cluster dianion [RuRh4(CO)9(m2-CO)6]2- and X-ray crystal structure of its
bis(triphenylphosphine)iminium salt. A. Fumagalli e G. Ciani. J. Organomet. Chem., 272 (1984) 91. |
100) |
Synthesis, crystal structure, and fluxional behavior of Re3H2(CO)10(h5-C7H9). T. Beringhelli, G. Ciani, G. D'Alfonso, P. Romiti, A. Sironi e M. Freni. Inorg. Chem., 23 (1984) 2849. |
101) |
High nuclearity Pt-Rh carbonyl clusters. Synthesis and X-ray
characterization of the [Pt2Rh9(CO)22]3- trianion. A. Fumagalli, S. Martinengo e G. Ciani. J. Organomet. Chem., 273 (1984) C46. |
102) |
A novel co-ordination mode of nitric oxide. Synthesis and crystal
structure of the [{Re3(m-H)3(CO)10}2(h4-m2-NO)]- anion. T. Beringhelli, G. Ciani, G. D'Alfonso, H. Molinari, A. Sironi e M. Freni. J. C. S. Chem. Commun., (1984) 1327. |
103) |
A new family of nitrido carbonyl clusters. Synthesis and structural
characterization of the anions [Rh6MN(CO)15]2- (M = Co, Rh, or Ir), and evidence
for metal atom migration in the cluster. S. Martinengo, G. Ciani e A. Sironi. J. C. S. Chem. Commun., (1984) 1577. |
104) |
Reactivity of the unsaturated anion decacarbonyltetra-m-hydrido-trirhenate(1-) toward phenols. Crystal and molecular structures
of the tetraethylammonium salts of the triangular cluster anion [Re3(m-H)3(m-OC6F5)(CO)10]- and of the binuclear anion [Re2(m-OC6H5)3(CO)6]-. T. Beringhelli, G. Ciani, G. D'Alfonso, A. Sironi e M. Freni. J. C. S. Dalton Trans., (1985) 1507. |
105) |
A new metallic environment for carbon in a carbido metal cluster: X-ray
crystal structure of the anion [Re4C(CO)15I]-. T. Beringhelli, G. Ciani, G. D'Alfonso, A. Sironi e M. Freni. J. C. S. Chem. Commun., (1985) 978. |
106) |
Interaction of metal ions with humic-like models. Part VII. Mn(II),
Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes of 2,5-dihydroxybenzoic acid. G. Micera, P. Piu, L. Strinna Erre, F. Cariati, G. Ciani e A. Sironi. Inorg. Chim. Acta, 107 (1985) 223. |
107) |
Synthesis, spectral properties, and crystal and molecular structure of
tetrakis(m-2,6-dimethoxybenzoato)
diaquadicopper(II) and of bis(m-2,6-dimethoxybenzoato)bis(m-acetato)diaquadicopper(II), a case of a dimeric copper(II) carboxylate
complex with mixed bridges. L. Strinna Erre, G. Micera, P. Piu, F. Cariati e G. Ciani. Inorg. Chem., 24 (1985) 2297. |
108) |
New synthesis, reinvestigation of the solid-state structure, and NMR
analysis of the unsaturated anion tetrakis(m-hydrido) decacarbonyl-triangulo-trirhenate(1-). T. Beringhelli, G. Ciani, G. D'Alfonso, H. Molinari e A. Sironi. Inorg. Chem., 24 (1985) 2666. |
109) |
Interaction of metal-ions with humic-like models. Part 8. Mn(II), Co(II),
Ni(II), Cu(II) and Zn(II) complexes of 2,4-dihydroxybenzoic acid. F. Cariati, G. Ciani, G.Micera, L. Strinna Erre e A. Sironi. Inorg. Chim. Acta, 108 (1985) L1. |
110) |
Reactions of the carbido cluster anion [Re7C(CO)21]3- with group IB metals: X-ray crystal
structure of the novel heterometallic carbide [{Re7AgC(CO)21}2Br]5-. T. Beringhelli, G. D'Alfonso, M. Freni, G. Ciani e A. Sironi. J. Organomet. Chem., 295 (1985) C7. |
111) |
Synthesis and X-ray crystal structure of the cluster compound [Rh12H2(m3-CO)3(m-CO)9(CO)13] containing a metallic array formed
by three superimposed cofacial octahedral units. G. Ciani, A. Sironi e S. Martinengo. J. C. S. Chem. Commun., (1985) 1757. |
112) |
Rhenium(V) oxide complexes. Crystal and molecular structures of ReOI2(PPh3)2(OReO3) and of ReOI2(PPh3)(OPPh3)(OReO3). 0.5C6H6 obtained from the reaction of ReO2I(PPh3)2 with oxygen. G. Ciani, A. Sironi, T. Beringhelli, G. D'Alfonso e M. Freni. Inorg. Chim. Acta, 113 (1986) 61. |
113) |
Synthesis and X-ray crystal structure of the novel hydridocarbonyl cluster
[NEt4][Re4(m-H)5(CO)14]. T. Beringhelli, G. Ciani, G. D'Alfonso, V. De Malde, A. Sironi e M. Freni. J. C. S. Dalton Trans., (1986) 1051. |
114) |
Synthesis and X-ray characterization of the novel anion [Co6N(CO)13]- : The first example of an
octahedral nitrido-carbonyl cluster compound in the cobalt subgroup. G. Ciani e S. Martinengo. J. Organomet. Chem., 306 (1986) C49. |
115) |
An unusual example of spontaneous carbon monoxide elimination at room
temperature in a cluster compound. Synthesis and characterization of the two unsaturated
anions [Re3H3(CO)n(AuPPh3)]- (n = 9 or 10) and X-ray structure
of [Re3(m-H)3(CO)9(m3-AuPPh3)]-. T. Beringhelli, G. Ciani, G. D'Alfonso, V. De Malde' e M. Freni. J. C. S. Chem. Commun., (1986) 735. |
116) |
Mixed platinum-rhodium carbonyl clusters. Synthesis, reactivity, and
chemical characterization of the [PtRh8(m3-CO)3(m-CO)9(CO)7]2- anion and X-ray crystal structure
of its tetraethylammonium salt. A. Fumagalli, S. Martinengo, G. Ciani e G. Marturano. Inorg. Chem., 25 (1986) 592. |
117) |
An unusual species from the reaction of the unsaturated anion [Re3(m-H)4(CO)10]- with Me3NO. Synthesis and spectroscopic
characterization of the adduct anion [Re3(m-H)3(CO)9(m3-O...H...NMe3)]- and crystal and molecular structure
of its tetraethylammonium salt. T. Beringhelli, G. D'Alfonso, M. Freni, G. Ciani e H. Molinari. J. Organomet. Chem., 311 (1986) 177. |
118) |
Synthesis and X-ray crystal structure of the cluster dianion, [Rh10(CO)21]2-, containing a new compact array of
metal atoms. S. Martinengo, G. Ciani e A. Sironi. J. C. S. Chem. Commun., (1986) 1282. |
119) |
Reactions of the unsaturated anion [Re3(m-H)4(CO)10]- with phosphines. Synthesis of the
anions [Re3(m-H)2(CO)10(PR3)2]-, and crystal structure of [NEt4][Re3(m-H)2(CO)10(PPh3)2]. T. Beringhelli, G. Ciani, G. D'Alfonso e M. Freni. J. Organomet. Chem., 311 (1986) C51. |
120) |
Stereochemical studies on the interconversion of alkylidenecarbene,
carbene, and alkyl ligands in chiral cyclopentadienyl ruthenium complexes. G. Consiglio, F. Morandini, G. Ciani e A. Sironi. Organometallics, 5 (1986) 1976. |
121) |
Synthesis and X-ray crystal structure of the novel cluster anion [Rh12H(N)2(CO)23]3-; an irregular metallic array
containing two interstitial nitrogen atoms. S. Martinengo, G. Ciani e A. Sironi. J. C. S. Chem. Commun., (1986) 1742. |
122) |
Synthesis and characterization of a new family of unsaturated triangular
rhenium cluster anions of formula [Re3(m-H)4(CO)9L]- (L = neutral two-electron donor
ligand). X-ray crystal and molecular structures of the tetraethylammonium salts of the
anions with L = triphenylphosphine and pyridine. T. Beringhelli, G. Ciani, A. Sironi. G. D'Alfonso, M. Freni e H. Molinari. J. C. S. Dalton Trans., (1986) 2691. |
123) |
Reduction of a coordinated carbon monoxide to an oxymethyl-bridging group:
synthesis and X-ray characterization of the dianion [Re3(m-H)3(m3-h2-CH2O)(CO)9]2-. T. Beringhelli, G. D'Alfonso, G. Ciani e H. Molinari. Organometallics, 6 (1987) 194. |
124) |
Synthesis of two novel Re7 carbido-carbonyl complexes. X-ray crystal structure of the anion [Re7C(CO)22]-. T. Beringhelli, G. D'Alfonso, M. De Angelis, G. Ciani e A. Sironi. J. Organomet. Chem., 322 (1987) C21. |
125) |
A novel unsaturated tetrahedral hydrido-carbonyl cluster anion of rhenium.
Synthesis and X-ray characterization of [Re4(m-H)3(m3-H)2(CO)12]-. T. Beringhelli, G. D'Alfonso, G. Ciani e H. Molinari. J. C. S. Chem. Commun., (1987) 486. |
126) |
Synthesis and stereochemical studies of the chiral ruthenium complexes
[Ru(h5-C5H5){(s)dpompyr-PP'}X] [dpompyr =
N-diphenylphosphino-2-(diphenylphosphinoxymethyl)pyrrolidine, X = H or Cl]. Crystal structure of [(S)Ru(h5-C5H5){(S)dpompyr-PP'}Cl]. E. Cesarotti, A. Sironi, G. Ciani, L. Prati e C. White. J. C. S. Dalton Trans., (1987) 1149. |
127) |
New hydrido-carbonyl rhenates by reduction of [Re2(CO)10] with bases. X-ray crystal
structure of the anion [Re2H2(m-H)(CO)8]-. T. Beringhelli, G. D'Alfonso, L. Ghidorsi, G. Ciani, A. Sironi e H. Molinari. Organometallics, 6 (1987) 1365. |
128) |
Bismuth-cobalt heteronuclear carbonyl cluster compounds. Synthesis and
X-ray characterization of the neutral [BiCo3(CO)9] and of the paramagnetic anion [Bi2Co4(CO)11]-. S. Martinengo e G. Ciani. J. C. S. Chem. Commun., (1987) 1589. |
129) |
A case of solid-state isomerism for a rhodium carbonyl cluster anion.
Synthesis, characterization in solution and X-ray crystallographic structures of the salts
[NMe4]3[RH11(CO)23].Me2CO and [NMe4]3 [Rh11(CO)23].C6H5Me. A. Sironi, G. Ciani, A. Fumagalli, B.T. Heaton e S. Martinengo. J. C. S. Dalton Trans., (1988) 163. |
130) |
Reduction of unsaturated organic molecules by hydridocarbonyl cluster
compounds of rhenium. Reaction of the anion [Re3(m-H)4(CO)10]- with acetone: crystal structure of
[NEt4] [Re3(m-H)3(m-OCHMe2)(CO)10]. T. Beringhelli, G. Ciani, G. D'Alfonso, M. Freni, M. Moret e A. Sironi. J. Organomet. Chem., 339 (1988) 323. |
131) |
Synthesis, structure, and spectroscopic and magnetic properties of catena-m-aqua-diaquabis(2,6-dimethoxybenzoato)metal(II) monohydrate complexes of
manganese, cobalt, nickel, and zinc. X-ray crystal structure of [Co(dmba)2(H2O)3].H2O. L. Strinna Erre, G. Micera, F. Cariati, G. Ciani, A. Sironi, H. Kozlowski e J. Baranowski. J. C. S. Dalton Trans., (1988) 363. |
132) |
Crystal and molecular structure of the anion [Rh7(CO)16]3- in its tetramethylammonium salt. V. G. Albano, P. L. Bellon e G. Ciani. J. C. S. Dalton Trans., (1988) 1103. |
133) |
X-ray crystal structures of two isomers of the hydrido-carbonyl anion [Re7(m-H)C(CO)21]2-. The problematic existence of
triply bridging hydrides in clusters containing interstitial main-group elements. T. Beringhelli, G. D'alfonso, G. Ciani, A. Sironi e H. Molinari. J. C. S. Dalton Trans., (1988) 1281. |
134) |
Bi-Co heteronuclear carbonyl compounds. Synthesis of the anion [Bi{Co(CO)4}4]- and X-ray crystal structure of its
tetramethylammonium salt. S. Martinengo, A. Fumagalli, G. Ciani e M. Moret. J. Organomet. Chem., 347 (1988) 413. |
135) |
A new high nuclearity cobalt nitrido-carbonyl cluster. Synthesis and
crystal structure of the anion [Co14N3(CO)26]3-. S. Martinengo, G. Ciani e A. Sironi. J. Organomet. Chem., 358 (1988) C23. |