1H NMR OF SIMPLE MOLECULES.. Brush up

ما هو هذا، لماذا أنت قلق، فرشاة مع الأشياء البسيطة، وسوف يخرج عبقري، وتعلم معي، قطرات صغيرة من الماء جعلالمحيطات، وسوف يكون خبيرا في هذا

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あなたが心配している理由は、これは簡単なことでブラッシュアップ、、何か、あなたは、天才が出てくる私と一緒に学ぶことが、水の小さな滴が海を作るには、この専門家になる

structure

4-methylbenzaldehyde

NMR Spectrum

The proton NMR has three peaks; a singlet at 2.2 (3H), and a singlet at 10 (1H) and two doublets centered around 7.6. The doublets centered at 7.6 are in the aromatic region; the fact that two doublets are observed (2H each) suggests a 1,4-disubstituted aromatic compound.

The peak at 2.2 is in the region for a methyl group adjacent a mildly electronegative group. The singlet at 10 is in the region observed for aldehydic protons. The presence of two doublets in the aromatic region is highly characteristic of 1,4-disubstitution.

τι είναι αυτό, γιατί είσαι ανήσυχος, βούρτσα με απλά πράγματα, θα βγει ιδιοφυΐα, να μάθουν μαζί μου, μικρές σταγόνες του νερού κάνει έναν ωκεανό, θα είστε ένας εμπειρογνώμονας σε αυτό

structure

methyl acetate (methyl ethanoate)

NMR Spectrum

The proton NMR has two singlets of equal area. The fact that the molecule has 6 hydrogens means that there must be two non-identical CH₃ groups in the molecule and that they are non-adjacent. The peak at 1.95 is in the area generally observed for methyl groups adjacent to carbonyls; the peak at 3.85 is in the region for methyl groups adjacent to electronegative atoms, i.e., oxygen.

আপনি চিন্তিত কেন এই সহজ জিনিস নিয়ে ব্রাশ,, কি, আপনি, প্রতিভা বাইরে আসতে আমার সাথে শিখতে হবে, জলের ছোট ঝরিয়া একটি মহাসাগর না, আপনি এই একজন বিশেষজ্ঞ হতে হবে

structure
diethyl ketone (3-pentanone)

NMR Spectrum

The proton NMR has a quartet and a triplet, indicating a CH₂ adjacent to a CH₃. The peak at 2.5 is in the area generally observed for methyl groups adjacent to mildly electronegative groups; the peak at 1.2 is in the region for simple methyl groups adjacent to carbons (CH₃CH₂). The molecule contains oxygen, but the peak at 2.5 is not shifted enough for this to represent an -O- linkage, so it must represent a carbonyl.

מה זה, למה אתה מודאג, לרענן עם דברים פשוטים, אתה תצא גאון, ללמוד איתי, טיפות קטנות של מיםיגרמו לים, אתה תהיה מומחה בזה

structure

acetaldehyde (ethanal)

NMR Spectrum

The proton NMR has two peaks; at high resolution, fine coupling is evident between them (J 1 Hz) with the peak at 9.7 being a quartet and the peak at 2.1 being a doublet, indicating a CH coupled to a CH₃. The peak at 9.7 is in the area generally observed for aldehydic protons; the peak at 2.1 is in the region for a methyl group adjacent a carbonyl. The molecule contains oxygen, but the peak at 2.1 is not shifted enough for this to represent an -O- linkage, so it must represent a carbonyl. The very small coupling constant suggests that the proton and the CH₃ group are not immediately adjacent, but that this represents an example of cross-space coupling.

o que é isso, por que você está preocupado, retocar com coisas simples, você vai sair gênio, aprender comigo, pequenas gotas de água fazem um oceano, você vai ser um especialista neste

structure

Name: ethyl acetate (ethyl ethanoate)

NMR Spectrum

The proton NMR has three peaks; a quartet at 4.1 (2H), a triplet at 1.2 (3H) and a singlet at 1.97 (3H). The quartet and triplet suggest a CH₂ coupled to a CH₃ in an ethyl group. The peak at 4.1 is in the area generally observed for CH groups adjacent to electronegative groups, i.e., oxygen. The peak at 2 is in the region for a methyl group adjacent a carbonyl.

நீங்கள் கவலை ஏன் இந்த எளிய பொருட்களை கொண்டு துலக்க, என்ன, நீங்கள், மேதை வெளியே வர எனக்கு கற்று, நீர் சிறு துளிகள் ஒரு கடல் செய்ய, நீங்கள் இந்த ஒரு நிபுணர் இருக்கும்

के तपाईं चिंतित हो किन यो सरल कुरा संग ब्रश,, के हो, तपाईं, प्रतिभा बाहिर आउन मलाई संग सिक्न हुनेछ, पानी सानो थोपा एक महासागर बनाउन, तपाईं यस मा एक विशेषज्ञ हुनेछ\

તમને ચિંતા થતી હોય કે શા માટે આ સરળ બાબતો સાથે બ્રશ, શું છે, તમે પ્રતિભા બહાર આવે મારી સાથે શીખશે, પાણી નાના ટીપાં સમુદ્ર કરો, તો તમે આ એક નિષ્ણાત હશે

kas tas ir, kāpēc jūs uztraucaties, suka ar vienkāršām lietām, jūs iznākt ģēnijs, mācīties kopā ar mani, nelieli ūdens pilieni veikt okeānu, jums būs eksperts šajā

что это такое, почему ты беспокоишься, освежить с простых вещей, вы будете выходить гений, узнать со мной, маленькие капли воды сделать океан, вы будете экспертом в этом

hvað er þetta, af hverju ert þú áhyggjur, bursta upp með einföldum hlutum, verður þú að koma út snillingur, læra með mér, litla dropa af vatni gera haf, verður þú að vera sérfræðingur í þessu

methyl vinyl ether (methyl ethenyl ether)

The proton NMR has four groups of peaks; the singlet at

3.6 (3H) is consistent with an isolated CH₃ group adjacent to an electronegative center, such as oxygen. The sets of highly split doublets centered at

6.5, 4.2 and 4.0 (there is overlap of these at

4.1) span the region where alkene hydrogens are observed. The complex splitting pattern observed resembles an ABC pattern for a terminal alkene.

这是什么，你为什么担心，刷了简单的事情，你会出来的天才，学我，小水珠做出的海洋，你将在这方面的专家

당신이 걱정하는 이유는 간단한 것들로 브러시, 무엇인가, 당신은 천재 나올 나와 함께 배울 것, 물 작은 방울은 바다를 만들어,이 분야의 전문가가 될 것입니다

Name: 1,2-dimethoxyethane

The proton NMR has two peaks; both singlets are consistent with isolated groups adjacent to an electronegative center, such as oxygen. The fact that the molecule contains ten hydrogens, but only shows singlets for two and three hydrogens requires a great deal of symmetry in the molecule, i.e., both CH₃ groups must be identical, as must both CH₂ groups.

4-isopropyl-1-methoxybenzene (4-(1-methylethyl)-1-methoxybenzene)

The proton NMR has four sets of peaks; a singlet at

3.6 (3H), two sets of doublets centered around

6.9 (4H), a septet at

2.7 (1H) and a doublet at

1.6. The singlet at

3.6 is consistent with an isolated CH₃adjacent to an electronegative center, such as an oxygen. The septet and doublet strongly suggest an isopropyl group

CH(CH₃) ₂ in which the carbon is bonded to something mildly electronegative and the two doublets centered at

6.9 strongly suggest a 1,4-disubstituted aromatic compound.

3-bromomethyltoluene (3-bromomethyl-1-methylbenzene)

The proton NMR has three sets of peaks; a singlet at

4.3 (2H), a messy singlet around

7.1 (4H), and a singlet at

2.3 (3H). The singlet at

2.3 is consistent with an isolated CH₃ adjacent to a mildly electronegative center. The singlet at 4.3 is consistent with a CH₂ group adjacent to two mildly electronegative centers (X-CH₂-Y), and the singlet at

7.1 is consistent with a disubstituted aromatic compound. The substitution pattern is not what is normally seen in 1,4-disubstitution (two doublets), suggesting 1,2 or 1,3-disubstitution.

آپ پریشان کیوں ہیں اس سادہ چیزوں کے ساتھ برش،، کیا ہے، آپ، ہوشیار باہر آ میرے ساتھ سیکھ جائے گی، پانی کے چھوٹے چھوٹے قطرے ایک سمندر بنانے کے لئے، آپ کو اس میں ایک ماہر ہو جائے گا