Structures published

Total: 251

3'-(4-Chlorobenzoyl)-4'-(4-chlorophenyl)-1'-methylspiro[indoline-3,2'- pyrrolidin]-2-one

C₂₅H₂₀Cl₂N₂O₂

Srinivasan, T.Suhitha, S.Purushothaman, S.Raghunathan, R.Velmurugan, D.

Acta Crystallographica Section E (2011) 67, 11 o3128

a=11.4139(2)Å b=11.6957(2)Å c=16.5262(2)Å

α=90.00° β=102.0370(10)° γ=90.00°

Ethyl (1R,1'S,2'S,7a'R)-2-oxo- 1'-[(3aR,5R,5aS,8aS,8bR)-2,2,7,7- tetramethyltetrahydro-3aH- bis[1,3]dioxolo[4,5-b:4',5'-d]pyran-5-yl]-1',2',5',6',7',7a'- hexahydro-2H-spiro[acenaphthylene-1,3'-pyrrolizine]-2'-carboxylate

C₃₂H₃₇NO₈

Jagadeesan, G.Sethusankar, K.Prasanna, R.Raghunathan, R.

Acta Crystallographica Section E (2012) 68, 2 o382-o383

a=11.4723(4)Å b=8.9548(2)Å c=15.0543(5)Å

α=90.00° β=96.990(2)° γ=90.00°

1-(2-Hydroxyethyl)-1'-methyl-4'-(naphthalen-1-yl)-1'',2'',3'',4''-tetrahydrodispiro[indoline-3,2'-pyrrolidine-3',2''-naphthalene]-2,1''-dione

C₃₃H₃₀N₂O₃

Selvanayagam, S.Sridhar, B.Saravanan, P.Raghunathan, R.

Acta Crystallographica Section E (2012) 68, 3 o800-o801

a=12.0236(18)Å b=14.054(2)Å c=15.950(2)Å

α=90.00° β=107.796(2)° γ=90.00°

{1'-Phenyl-1',2',5',6',7',7a'-hexahydrospiro[indeno[1,2-b]quinoxaline- 11,3'-pyrrolizin]-2'-yl}(p-tolyl)methanone

C₃₅H₂₉N₃O

Srinivasan, T.Suhitha, S.Purushothaman, S.Raghunathan, R.Velmurugan, D.

Acta Crystallographica Section E (2012) 68, 8 o2469

a=16.4102(6)Å b=16.4371(6)Å c=20.0648(7)Å

α=90.00° β=90.00° γ=90.00°

Ethyl 7'-(6-benzyloxy-2,2-dimethyltetrahydrofuro[3,2-d][1,3]dioxol- 5-yl)-2-oxo-5',6',7',7a'-tetrahydro-1'H,2H-spiro[acenaphthylene- 1,5'-pyrrolo[1,2-c][1,3]thiazole]-6'-carboxylate

C₃₄H₃₅NO₇S

Jagadeesan, G.Sethusankar, K.Prasanna, R.Raghunathan, R.

Acta Crystallographica Section E (2012) 68, 8 o2505-o2506

a=8.588(5)Å b=20.446(5)Å c=8.851(5)Å

α=90.000(5)° β=93.282(5)° γ=90.000(5)°

3-(Ferrocen-1-ylcarbonyl)-1-methyl-4-(4-methylphenyl)spiro[pyrrolidine-2,11'- indeno[1,2-b]quinoxaline]

C₃₇H₃₁FeN₃O

Vijayakumar, B.Gavaskar, D.Srinivasan, T.Raghunathan, R.Velmurugan, D.

Acta Crystallographica Section E (2012) 68, 10 m1274

a=11.5966(3)Å b=11.8658(3)Å c=20.9383(6)Å

α=90.00° β=90.616(2)° γ=90.00°

4-[4-(4-Chlorobenzoyl)-2,3-diphenylisoxazolidin-5-yl]-1-(4-methoxyphenyl)- 3-phenylazetidin-2-one

C₃₈H₃₁ClN₂O₄

Suhitha, Sivasubramanian Srinivasan, Thothadri Prasanna, Ramanathan Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2012) 68, 10 o2914

a=10.1221(10)Å b=17.4890(17)Å c=17.7421(18)Å

α=90.00° β=98.150(6)° γ=90.00°

3'-Ferrocenylcarbonyl-1'-methyl-4'-phenylspiro[indeno[2,3- b]quinoxaline-11,2'-pyrrolidine]

C₃₆H₂₉FeN₃O

Vijayakumar, B.Gavaskar, D.Srinivasan, T.Raghunathan, R.Velmurugan, D.

Acta Crystallographica Section E (2012) 68, 11 m1382-m1383

a=11.1008(4)Å b=11.9156(5)Å c=21.0511(9)Å

α=90.00° β=90.944(2)° γ=90.00°

4-Ferrocenyl-1-methyl-3-benzoylspiro[pyrrolidine-2,11'- indeno[1,2-b]quinoxaline]

C₃₆H₂₉FeN₃O

Vijayakumar, B.Sureshbabu, A. R.Gavaskar, D.Raghunathan, R.Velmurugan, D.

Acta Crystallographica Section E (2012) 68, 12 m1576-m1577

a=10.8091(18)Å b=12.326(2)Å c=20.989(3)Å

α=90.00° β=100.654(8)° γ=90.00°

11-Hydroxy-9-[1-(4-methylphenyl)-4-oxo-3-phenylazetidin-2-yl]-18-oxo-10-oxa- 2-azapentacyclo[9.7.0.0^1,8^.0^2,6^.0^12,17^]octadeca-12,14,16-triene-8- carbonitrile

C₃₃H₂₉N₃O₅

Suhitha, Sivasubramanian Srinivasan, Thothadri Rajesh, Raju Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2012) 68, 12 o3290-o3291

a=10.2874(16)Å b=14.138(3)Å c=18.866(3)Å

α=90.00° β=90.00° γ=90.00°

4'-Methyl-1H-14',19'-dioxa-4'-azaspiro[indole-3,5'- tetracyclo[18.4.0.0^2,6^.0^8,13^]tetracosane]-1'(24'),8',10',12',20',22'- hexaene-2,7'(3H)-dione

C₂₉H₂₈N₂O₄

Narayanan, Sibi Srinivasan, Thothadri Purushothaman, Santhanagopalan Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2012) 68, 12 o3344

a=9.4223(3)Å b=10.5115(3)Å c=14.1754(5)Å

α=70.235(2)° β=87.309(3)° γ=69.065(2)°

4'-Methyl-14',19'-dioxa-4'-azaspiro[acenaphthylene-1,5'- tetracyclo[18.4.0.0^2,6^.0^8,13^]tetracosane]-1'(24'),8',10',12',20',22'- hexaene-2,7'(1H)-dione

C₃₃H₂₉NO₄

Narayanan, Sibi Srinivasan, Thothadri Purushothaman, Santhanagopalan Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2012) 68, 12 o3345

a=11.248(2)Å b=16.609(3)Å c=14.037(3)Å

α=90.00° β=92.965(6)° γ=90.00°

Methyl 12-hydroxy-10-[1-(4-methoxyphenyl)-2-oxo-3-phenoxyazetidin-4-yl]- 11-oxa-3-azahexacyclo[11.7.1.0^2,9^.0^2,12^.0^3,7^.0^17,21^]henicosa- 1(20),13,15,17(21),18-pentaene-9-carboxylate

C₃₇H₃₄N₂O₇

Suhitha, Sivasubramanian Srinivasan, Thothadri Rajesh, Raju Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2012) 68, 12 o3329-o3330

a=9.6545(11)Å b=20.363(2)Å c=31.804(3)Å

α=90.00° β=90.00° γ=90.00°

1-(4-{2-[(E)-3-(4-Chlorophenyl)-3-oxoprop-1-en-1-yl]phenoxy}butyl)-1H-indole-3-carbaldehyde

C₂₈H₂₄ClNO₃

Paramasivam, S.Purushothaman, Santhanagopalan Seshadri, P. R.Raghunathan, Raghavachary

Acta Crystallographica Section E (2013) 69, 2 o314-o315

a=8.7126(3)Å b=19.1311(6)Å c=13.9338(4)Å

α=90.00° β=93.198(2)° γ=90.00°

Methyl 11-hydroxy-9-[1-(4-methoxyphenyl)-4-oxo-3-phenylazetidin-2-yl]-18-oxo-10-oxa-2-azapentacyclo[9.7.0.0^1,8^.0^2,6^.0^12,17^]octadeca-12(17),13,15-triene-8-carboxylate

C₃₄H₃₂N₂O₇

Suhitha, Sivasubramanian Srinivasan, Thothadri Rajesh, Raju Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 3 o438-o439

a=10.9030(5)Å b=11.8792(5)Å c=22.4457(10)Å

α=90.00° β=93.963(3)° γ=90.00°

(3E)-11,16-Dioxatricyclo[15.4.0.0^5,10^]henicosa-1(21),3,5,7,9,17,19- heptaen-2-one

C₁₉H₁₈O₃

Ganesh, Gnanavelu Purushothaman, Santhanagopalan Kannan, Piskala Subburaman Raghunathan, Raghavachary SubbiahPandi, Arunachalathevar

Acta Crystallographica Section E (2013) 69, 3 o442

a=9.0976(6)Å b=16.9797(11)Å c=17.2713(9)Å

α=62.590(2)° β=88.440(2)° γ=78.092(2)°

(E)-3-(2-(2-hydroxyethoxy)ferrocenyl)-1-phenylprop-2-en-1-one

C₂₁H₂₀FeO₃

Paramasivam, S.Purushothaman, Santhanagopalan Seshadri, P. R.Raghunathan, Raghavachary

Acta Crystallographica Section E (2013) 69, 3 m144

a=12.5649(10)Å b=19.0531(14)Å c=7.4930(6)Å

α=90.00° β=103.932(3)° γ=90.00°

Methyl (2Z)-2-[(2-formyl-3-methyl-1H-indol-1-yl)methyl]-3-(4-methoxyphenyl)prop-2-enoate

C₂₂H₂₁NO₄

Selvanayagam, S.Sridhar, B.Kathiravan, S.Raghunathan, R.

Acta Crystallographica Section E (2014) 70, 4 o431-o432

a=12.6009(13)Å b=10.7458(11)Å c=14.8937(16)Å

α=90° β=111.954(2)° γ=90°

(1S,3'S,3a'R,6'S)-6'-(2-Chlorophenyl)-3'-[(2R,3S)-1-(4-methoxyphenyl)-4-oxo-3-phenylazetidin-2-yl]-2-oxo-3',3'a,4',6'-tetrahydro-2H,2'H-spiro[acenaphthylene-1,1'-pyrrolo[1,2-c][1,3]thiazole]-2',2'-dicarbonitrile

C₄₁H₂₉ClN₄O₃S

Devi, Seenivasan Karthiga Srinivasan, Thothadri Rajesh, Raju Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 5 o750-o751

a=10.7611(5)Å b=14.3742(7)Å c=11.6657(6)Å

α=90.00° β=110.107(3)° γ=90.00°

8,13,26-Trioxa-23-thia-21-azapentacyclo[18.6.0.0^2,7^.0^14,19^.0^21,25^]hexacosa-2(7),3,5,14,16,18-hexaene

C₂₁H₂₃NO₃S

Devi, Seenivasan Karthiga Srinivasan, Thothadri Purushothaman, Santhanagopalan Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 6 o892

a=9.9858(5)Å b=17.8830(8)Å c=10.2054(4)Å

α=90.00° β=94.663(2)° γ=90.00°

6a-Nitro-6-phenyl-6,6a,6b,7,8,9,10,12a-octahydrospiro[chromeno[3,4-a]indolizine-12,3'-indolin]-2'-one

C₂₈H₂₅N₃O₄

Devi, Seenivasan Karthiga Srinivasan, Thothadri Rao, Jonnalagadda Naga Siva Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 6 o993

a=23.2940(13)Å b=11.2517(7)Å c=19.7702(10)Å

α=90.00° β=112.659(3)° γ=90.00°

Methyl 9-(4-methoxyphenyl)-19-methyl-3,12-diazapentacyclo[10.7.0.0^2,10^.0^3,8^.0^13,18^]nonadeca-1(19),13(18),14,16-tetraene-10-carboxylate

C₂₇H₃₀N₂O₃

Selvanayagam, S.Sridhar, B.Kathiravan, S.Raghunathan, R.

Acta Crystallographica Section E (2013) 69, 5 o776

a=22.672(3)Å b=8.8049(11)Å c=24.431(3)Å

α=90.00° β=110.487(2)° γ=90.00°

3-Nitro-2-Ferrocene-2H-Chromene

C₁₉H₁₅FeNO₃

Paramasivam, S.Naga Siva Rao, Jonnalagadda Seshadri, P. R.Raghunathan, Raghavachary

Acta Crystallographica Section E (2013) 69, 7 m378

a=10.047(5)Å b=19.317(5)Å c=8.135(5)Å

α=90.000° β=96.667(5)° γ=90.000°

6-(4-Methoxyphenyl)-6a-nitro-6,6a,6b,7,8,9,10,12a-octahydrospiro[chromeno[3,4-a]indolizine-12,3'-indolin]-2'-one

C₂₉H₂₇N₃O₅

Devi, Seenivasan Karthiga Srinivasan, Thothadri Rao, Jonnalagadda Naga Siva Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 7 o1047

a=9.3438(3)Å b=11.3626(4)Å c=13.5713(4)Å

α=68.6870(10)° β=88.2840(10)° γ=66.7570(10)°

Methyl 2-(2,2-dimethyl-3a,6a-dihydrofuro[3,2-d][1,3]dioxol-5-yl)-4-oxo-4H-chromene-3-carboxylate

C₁₈H₁₆O₇

Fatima, Zeenat Srinivasan, Thothadri Rao, Jonnalagadda Naga Siva Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 8 o1310

a=6.8875(3)Å b=15.4958(6)Å c=15.9035(6)Å

α=90.00° β=90.00° γ=90.00°

Allyl 2-(2,2-dimethyl-3a,6a-dihydrofuro[3,2-d][1,3]dioxol-5-yl)-4-oxo-4H-chromene-3-carboxylate

C₂₀H₁₈O₇

Fatima, Zeenat Srinivasan, Thothadri Rao, Jonnalagadda Naga Siva Raghunathan, Raghavachary Velmurugan, Devadasan

Acta Crystallographica Section E (2013) 69, 8 o1257-o1258

a=6.9461(6)Å b=15.5688(11)Å c=16.5572(11)Å

α=90.00° β=90.00° γ=90.00°

C₁₅H₁₇NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=10.8270(3)Å b=11.5685(3)Å c=21.0508(5)Å

α=90.00° β=90.00° γ=90.00°

C₂₁H₂₉NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=7.6815(2)Å b=10.6260(3)Å c=22.9383(6)Å

α=90.00° β=90.00° γ=90.00°

C₂₁H₂₉NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=7.6714(3)Å b=10.6397(4)Å c=22.9376(8)Å

α=90.00° β=90.00° γ=90.00°

C₂₁H₂₉NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=7.89140(10)Å b=14.9048(3)Å c=16.1601(3)Å

α=90.00° β=90.00° γ=90.00°

C₂₁H₂₉NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=7.8906(3)Å b=14.9107(4)Å c=16.1614(5)Å

α=90.00° β=90.00° γ=90.00°

C₂₁H₂₉NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=23.3289(6)Å b=7.9711(2)Å c=10.6124(3)Å

α=90.00° β=110.4700(10)° γ=90.00°

C₂₁H₂₉NO₂

Ahuja, Sapna Raghunathan, Ramya Kumarasamy, Elango Jockusch, Steffen Sivaguru, Jayaraman

Journal of the American Chemical Society (2018) 140, 41 13185-13189

a=23.3220(6)Å b=7.9725(2)Å c=10.6113(3)Å

α=90.00° β=110.4110(10)° γ=90.00°

C₁₆H₁₉NO

Kumarasamy, Elango Raghunathan, Ramya Kandappa, Sunil Kumar Sreenithya, A.Jockusch, Steffen Sunoj, Raghavan B.Sivaguru, J.

Journal of the American Chemical Society (2017) 139, 2 655-662

a=9.3923(2)Å b=10.7073(2)Å c=12.7975(3)Å

α=90° β=90° γ=90°

C₁₆H₁₉NO

Kumarasamy, Elango Raghunathan, Ramya Kandappa, Sunil Kumar Sreenithya, A.Jockusch, Steffen Sunoj, Raghavan B.Sivaguru, J.

Journal of the American Chemical Society (2017) 139, 2 655-662

a=9.3935(2)Å b=10.7059(3)Å c=12.8032(3)Å

α=90° β=90° γ=90°

C₁₇H₂₁NO

Kumarasamy, Elango Raghunathan, Ramya Kandappa, Sunil Kumar Sreenithya, A.Jockusch, Steffen Sunoj, Raghavan B.Sivaguru, J.

Journal of the American Chemical Society (2017) 139, 2 655-662

a=8.5255(2)Å b=12.7647(4)Å c=13.2058(4)Å

α=90° β=90° γ=90°

C₁₇H₂₁NO

Kumarasamy, Elango Raghunathan, Ramya Kandappa, Sunil Kumar Sreenithya, A.Jockusch, Steffen Sunoj, Raghavan B.Sivaguru, J.

Journal of the American Chemical Society (2017) 139, 2 655-662

a=8.5245(2)Å b=12.7658(4)Å c=13.2061(4)Å

α=90° β=90° γ=90°

C₁₅H₁₅NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=7.2608(2)Å b=12.2775(4)Å c=13.9906(5)Å

α=90° β=90° γ=90°

C₁₆H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.0478(3)Å b=7.4742(2)Å c=10.4273(3)Å

α=90° β=117.9950(10)° γ=90°

C₁₆H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.4155(4)Å b=10.8207(4)Å c=11.9003(4)Å

α=90° β=90° γ=90°

C₁₆H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.0586(15)Å b=7.4726(11)Å c=10.4252(15)Å

α=90° β=117.968(5)° γ=90°

C₁₅H₁₅NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=14.5256(3)Å b=6.9706(2)Å c=24.6411(6)Å

α=90° β=92.0890(10)° γ=90°

C₁₆H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.4007(7)Å b=10.8621(7)Å c=11.9388(8)Å

α=90° β=90° γ=90°

C₂₀H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.5863(5)Å b=7.2819(3)Å c=10.7905(5)Å

α=90° β=112.547(2)° γ=90°

C₂₀H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.5871(2)Å b=7.2845(2)Å c=10.7784(3)Å

α=90° β=112.488(2)° γ=90°

C₁₆H₁₇NO₂

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.4120(3)Å b=11.0795(3)Å c=11.1114(4)Å

α=90° β=90° γ=90°

C₁₅H₁₅NO_3,0.5(O)

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.9054(3)Å b=17.4588(4)Å c=6.6865(2)Å

α=90° β=90° γ=90°

0.5(H₂O)_,C₁₅H₁₅NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.9133(2)Å b=17.4560(4)Å c=6.68560(10)Å

α=90° β=90° γ=90°

C₂₆H₃₁NO₃

Ramya Raghunathan Elango Kumarasamy Akila Iyer Angel Ugrinov J. Sivaguru

Chem.Commun. (2013) 49, 8713

a=9.4837(3)Å b=11.0800(3)Å c=11.5198(3)Å

α=90.00° β=106.7490(10)° γ=90.00°

1-(2-Cholorophenyl)-1H-indan-2-spiro-2'-pyrrolizidine-3'-spiro-3''- 1H-indole-1,3,2''(2H,3''H)-trione

C₂₈H₂₁ClN₂O₃

M. M. Govind S. Selvanayagam D. Velmurugan K. Ravikumar A. R. Sureshbabu R.Raghunathan

Acta Crystallographica Section E (2004) 60, 1 o54-o56

a=10.8456(6)Å b=14.1502(8)Å c=15.2068(9)Å

α=90.00° β=92.0530(10)° γ=90.00°

C₂₀H₁₇NO₃

Kumarasamy, Elango Raghunathan, Ramya Jockusch, Steffen Ugrinov, Angel Sivaguru, J.

Journal of the American Chemical Society (2014) 136, 24 8729-8737

a=10.9776(3)Å b=9.9868(3)Å c=28.5806(8)Å

α=90° β=90° γ=90°