490
Hrnciar P., Hrnciar P., Gajda, Svanygova, Toma:
(CH3); 4.21 s, 3 H (OCH3); 5.30 m, 1 H (ArCr(CO)3); 5.54 d, 2 H, J = 4 (ArCr(CO)3); 6.02 d, 1 H,
J = 6 (ArCr(CO)3).
2-Ethyl-3-methoxy[η6-(2-inden-1-one)]tricarbonylchromium (14b)
Complexation of 12b afforded 14b (22%) as violet crystals, m.p. 132–135 °C. For C15H12CrO5
1
(324.0) calculated: 55.56% C, 3.72% H; found: 55.94% C, 3.80% H. H NMR spectrum: 1.12 t, 3 H
(CH3); 2.46 q, 2 H (OCH2); 4.18 s, 3 H (OCH3); 5.25 m, 1 H (ArCr(CO)3); 5.50 m, 2 H
(ArCr(CO)3); 6.00 d, 1 H, J = 6 (ArCr(CO)3).
2-Ethyl-3-ethoxy(η6-2-inden-1-one)tricarbonylchromium (14c)
Complexation of 12c afforded 14c (18%) as violet crystals, m.p. 125–127 °C. For C16H14CrO5
1
(338.1) calculated: 56.80% C, 4.14% H; found: 56.53% C, 4.13% H. H NMR spectrum: 1.10 t, 3 H
(CH3); 1.46 t, 3 H (CH3); 2.41 q, 2 H (CH2); 4.46 q, 2 H (OCH2); 5.30 m, 1 H (ArCr(CO)3); 5.52 m,
2 H (ArCr(CO)3); 5.61 d, 1 H, J = 6 (ArCr(CO)3).
Complexation of compound 12d afforded a mixture of 14d (39%), 15d (39%), and 16d (2%).
3-Methoxy-2-phenyl[η6-(2-inden-1-one)]tricarbonylchromium (14d), brown crystals, m.p. 165 °C
(dec.). For C19H12CrO5 (372.3) calculated: 61.29% C, 2.97% H; found: 60.73% C, 3.20% H. 1H
NMR spectrum: 3.79 s, 3 H (OCH3); 5.41 t, 1 H (ArCr(CO)3); 5.62 t, 1 H (ArCr(CO)3); 5.61 d, 1 H,
J = 6 (ArCr(CO)3); 6.10 d, 1 H, J = 6 (ArCr(CO)3); 7.35 bs, 5 H (C6H5).
3-Methoxy-2-(η6-phenyltricarbonylchromium)-2-inden-1-one (15d), violet crystals, m.p. 153.4–
154.5 °C. For C19H12CrO5 (372.3) calculated: 61.29% C, 2.97% H; found: 61.08% C, 3.28% H. 1H
NMR spectrum: 4.45 s, 3 H (OCH3); 5.36 m, 3 H (ArCr(CO)3); 6.12 m, 2 H (ArCr(CO)3); 7.46 m,
4 H (C6H4).
3-Methoxy-2-(η6-phenyltricarbonylchromium)[η6-(2-inden-1-one)]tricarbonylchromium (16d), black-violet
crystals, m.p. 137–142 °C (dec.). For C22H12Cr2O8 (508.3) calculated: 51.98% C, 2.38% H; found:
1
51.54% C, 2.41% H. H NMR spectrum: 4.25 s, 3 H (COCH3); 5.37 m, 3 H (ArCr(CO)3); 5.55 m, 2 H
(ArCr(CO)3); 5.95 m, 4 H (ArCr(CO)3).
Complexation of compound 12e afforded a mixture of 14e (21%), 15e (12%), and 16e (2%).
3-Ethoxy-2-phenyl[η6-(2-inden-1-one)]tricarbonylchromium (14e), brown crystals, m.p. 115–117 °C.
1
For C20H14CrO5 (384.4) calculated: 62.17% C, 3.65% H; found: 62.90% C, 3.52% H. H NMR spec-
trum: 1.25 t, 3 H (CH3); 4.04 q, 2 H (OCH3); 5.30 dt, 1 H (ArCr(CO)3); 5.57 m, 2 H (ArCr(CO)3);
6.10 d, 1 H, J = 5 (ArCr(CO)3); 7.35 bs, 5 H (C6H5).
3-Ethoxy-2-(η6-phenyltricarbonylchromium)-2-inden-1-one (15e), violet crystals, m.p. 152–154 °C.
1
For C20H14CrO5 (384.4) calculated: 62.17% C, 3.65% H; found: 61.88% C, 3.44% H. H NMR spec-
trum: 1.62 t, 3 H (CH3); 4.79 q, 2 H (OCH3); 5.37 m, 3 H (ArCr(CO)3); 6.14 dd, 2 H, J = 7
(ArCr(CO)3); 7.40 bs, 4 H (C6H4).
3-Ethoxy-2-(η6-phenyltricarbonylchromium)[η6-(2-inden-1-one)]tricarbonylchromium (16e), black-
violet crystals, m.p. 137–140 °C. For C23H14Cr2O8 (520.4) calculated: 53.08% C, 2.51% H; found:
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53.39% C, 2.78% H. H NMR spectrum: 1.59 t, 3 H (CH3); 4.50 q, 2 H (OCH2); 5.25–6.21 m, 9 H
(ArCr(CO)3).
1,3-Bis(ethylenedioxy)-2-methyl(η6-indan)tricarbonylchromium (20a)
Complexation of 19a afforded 20a (71%) as yellow crystals, m.p. >169 °C (dec.). For C17H15CrO5
1
(384.3) calculated: 53.15% C, 4.19% H; found: 52.75% C, 4.15% H. H NMR spectrum: 1.07 m (two
overlapped t), 3 H (CH3); 2.38 q, 0.33 H (CHR); 2.90 q, 0.66 H (CHR); 4.16 bs, 8 H (OCH2); 5.30 bs,
2 H (ArCr(CO)3); 5.43 bs, 2 H (ArCr(CO)3).
Collect. Czech. Chem. Commun. (Vol. 62) (1997)